Ch. 1 Real World Functions

My real world function is about time and destination.

A function is a relation where each value in the domain has exactly one value in the range.

A relation is a set of ordered pairs (x,y).

The independent variable(x) of my function is the time.
The dependent variable(y) is the destination.

The domain is [7:00, 7:15, 7:28, 7:45].
The range is [Burger King, Safeway, Lucky's, Applebee's].

The graph on the left is a function because it passed the vertical line test. All values of x has exactly one value of y. The graph on the right is a relation because it failed the vertical line test. The x-value cannot have two outputs of y.

Real World Function

My real world function is the simple shape toys that children play with. For every specific hole on the box there is only one shape that would be able to fit through. This is an example a function, a function is a relation that says that for every x value (domain) there is a specific y value (range). In this toy you can't put another shape into a hole that doesn't belong to that specific shape,for example you can't fit a triangle into a hole made specifically for a circle, this is a relation, a relation is an ordered pair (x,y) that doesn't have anything specific. 

Ch.1 Real World Functions

For my Real World Function project I based my real world function on four National Football League teams and their corresponding hometowns.

A function is a relation for which every input there is exactly one corresponding output. A function will also pass the vertical line test. A relation is a set of ordered pairs.

The x values or the football teams(Raiders, 49ers, Chargers, Seahawks) represent the domain/independent variable, while the y values or the home cities(Oakland, San Francisco, San Diego, Seattle) represent the range/dependent variable.

In a function there cannot be more than 1 element of y for every element of x. So, if Oakland and San Francisco were listed as the hometowns for The Oakland Raiders then the graph will not pass the vertical line test, therefore it will not be a function but, a relation.

Chapter 1 Real World Functions

A function is a relation where each input have only one output . A relation is a set of order pairs.

The Independent variables is the Monsters and the dependent variable is the health points.

The domain is the monsters snail, shroom, red snail, blue snail, green mushroom, and horny mushroom. The range is 15,20,25,50,80, and 200.

If the domain and range got switched it would not pass the vertical line test thus making it not a function.

Ch. 1 Real World Function

My real world function is based on the the temperature of the room and the temperature reading displayed on the corresponding thermometer. The independent variable is the temperature of the room and the dependent variable temperature reading displayed on the thermometer .The domains for both graphs are 55 degrees Fahrenheit to 75 degrees Fahrenheit. The range for both graphs are also 55 degrees Fahrenheit to 75 degrees Fahrenheit. The graph on the left is a function (expresses the intuitive idea that one quantity [input] completely determines another quantity [output]) because each temperature of the thermometer reading accurately corresponds with one temperature of the room. The graph on the right is a relation (a set of ordered pairs) because the temperature on the thermometer does not match the temperature of the room, one temperature of the room had more than one reading on the thermometer, failing as a function and resulting as a relation.

A function is a relation where an independent variable corresponds with exactly one dependent variable and passes the vertical line test.

A relation is where an independent variable can correspond with more than one dependent variable and does not pass the vertical line test.

In my graph, Each burger at McDonald's has their own price, but some burgers are also priced as a dollar via the Dollar Menu we all know and love. So now there are 3 - 4 burgers that are entirely different but they all cost one dollar. The independent variables, also called the domain, are the price of burger. The dependent variables, also called the range, are the type of burger.

Ch. 1 Real World Function

I did my real world function on a multicolored pen. The independent variables are the variables that control the dependent variable. The independent variables, or domain are purple, green, pink, orange, and blue which are the color of the switches. These are independent variables because they control what color of ink comes out of the pen. The colors of the switches are shown on the left side of the graphs. The dependent variables are the range, which are purple, green, pink, orange, and blue. These are dependent variables because their outcome depend on the independent variable. We can see that the top graph is a function because it always passes the vertical line test. Each domain has it's own value in the range. We can see that it's not a function because it does not pass the vertical line test, therefore it is a relation.

Ch.1 Real World Function

So I did my real world function on coins and the value of the coins. The Independent Variables are the Domain which is demonstrated by the name of the coin in this graph and the Dependent Variables are the Range which is the value in this case. The graph on the right is the Function graph and on the bottom it is a Relation graph. To tell the difference between 2 graph is rather if the graph passes the vertical line test which in this graph the dotted lines. Clearly we could see the bottom graph doesn't pass because the coins represented both value which could never happens. So when the graph doesn't pass it will be a Relation for Graphs that does pass it is a Function.

Ch 1 Real World Functions

A function is a relation where an independent variable corresponds with exactly one dependent variable and passes the vertical line test.

A relation is where an independent variable can correspond with more than one dependent variable and does not pass the vertical line test.

In my function graph, each country has their own flag. However, Korea has two flags (one for each sovereign state N. Korea and S. Korea) as shown in my relation graph. The independent variables, also called the domains, are the countries. The dependent variables, also called the range, are the flags.

My real world function is on the color of passport and the meaning/status of the color. A function is a set of points in where every x-input have only one y-output. A relation is a set of ordered pairs.

The Independent Variable/Domain of my real world function is the color of the passport or the x-inputs.
The Dependent Variable/Range of my real world function is the status of color or the y-output.

The top graph represents a function in which every x-input have only one y-output and that it passes the vertical line test.
The bottom graph represents a relation in which every x-input have more than one y-input and it fails the vertical line test.

Ch 1 Real World Function

This is my real world function project about the different types of sodas under Pepsi Co and the amount of calories they each have. A function is the relation between x and y, where for every input value of x, there's only one output value of y. A relation is a set of ordered pairs. The independent variable in this project is the different sodas, also the x value. The dependent variable is the amount of calories it has, the y value.

The upper graph shows that when each soda only have one value of variables, it is a function, but the lower right graph shows that there could be two input, in this case, two different soda with the same name, for example, mountain dew and diet mountain dew, and they both have different calories, which makes it not a function. You can see that the upper graph passes the vertical line test but not the lower right graph.

This function has a domain which is (Mountain Dew, Citrus Blast, Pepsi, Brisk, and Sierra Mist). The range is (110, 140, 100, 80, 100) in it's chronological order based on it's domain because each soda has a specific value of calories.

Ch 1 Real World Functions

My real world function is about high school and their school mascots.
A Function is a set of ordered pairs where for every input (X), there are only one output (Y).

A Relation is a set of ordered pairs.

The Independent Variables are the Domain of the Relation/Function which are represented by the X-Values (Input).
The Dependent Variables are the Range of the Relation/Function which are represented by the Y-Values (Output).

The left table and graph represents the Function of this project. the Indepdendent Variables are the Mascots and the Depdendent Variables are the high schools that uses the mascot.

The right table and graph represents the Relation of the project. The Relation represents why the Function would fail. This Function failed when the same mascot is being used by 2 schools.

The dotted line of both graphs represents the Vertical line test which helps us determine if a graph is a Function.

As you can see. the graph on the left passes the vertical line test but the graph on the right doesn't because there are 2 points that touches the vertical line which tells us that it is not a Function.

CH1 Real World Function

In this Project, we had to find an example of a real world function, and I chose the page number of a book called Pre-Calculus: Graphical, Numerical, Algebraic by Demana, Warts, Foley, and Kennedy.

Every time we turn the page in the book, we land on a certain section of a certain chapter, and in this case, I chose chapter 1.

For my example of a function (on the left) there are a certain amount of page numbers to be turned to end up on a certain section, but every time i flip a certain amount of pages to get to a chapter, I always started in the beginning page. A Function is a set of all points (x,F(x)) where each input as "x" has exactly one output which is represented as Y or F(x).

For my example of a Relation (on the right) which is a set of ordered pairs, which is not a Function, I used the same book to flip 70 pages to get to chapter 1.1, ;however, when I flipped 70 pages again, I did not land on chapter 1.1, i ended up on chapter 1.5, and when I flipped 70 pages again, I was found on a whole new chapter. This shows that it is not a relation because for every 70 pages i turn, i get more than one output, which goes against the rule of a function having one output for every input, in addition, it also fails the vertical line test, therefore, it is a relation.

The Independent variable in these two graphs are the page numbers, and the dependent variable were the sections of the chapter.

When i graphed out all of the coordinates, for my function example, i got a line that passes the vertical line test, meaning, it is a function. I got the Domain: [0,163] and the Range: Chapters: (1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7) U (2.3), but the relevant Domain to the function on the left was [70,163], and the relevant Domain for the relation on the right was only 70. This shows a basic idea of the difference between a Function and a Relation.

Ch1 Real World Functions

In this function, countries and their populations in 2010 are being compared.
A function is when the values of the domain produce only 1 range value.
A relation is a set of ordered pairs.
In the function, each country only has 1 population.
It fails as a function when the countries have more than 1 population, which is impossible. It becomes a relation.
The independent variables are the countries.
The dependent variables are their populations.
The domain is {China, India, US, UK, Russia, Mexico}
The range is [100k, 1.3m] because the lowest population in the 6 countries chosen is 100k(U.K) and the highest is 1.3m(China).

Ch 1 Real World Function

The graph on the top is a function where it shows the place of the work and how much the person gets paid and that for every x-value there is exactly one y-value.

The graph on the bottom is also about the pay and work but it is a relation since it showed for some x-values, there are two to three y-values on a point.

A relation is a set of ordered pairs (x,y).
A function is a relation for which each element of the domain (x) corresponds to exactly one element of the range (y).
The independent variable is the places of work.
The dependent variable is the amount of pay for work.
Domain - [Happy Teeth, Youthful Teeth, Western Dental, Central View]
Range - [12.67-20.78]

REAL WORLD FUNCTION 

Function- A relation that associated each value in the domain with exactly one      

             value in the range.

Relation- A set of ordered pairs of real numbers.

     

Ch 1 Real World Functions

My real world function is about the type of hair clip/comb used on a person's head.

The domain for this function is (0, 1, 2) which is the type of hair clippers.

The range is (0,1,2) which is the setting of the type of hair clipper used on a person's head.

The independent variable in the graphs is the type of hair clip/comb used.

The dependent variable in the graphs is the type of hair clip/comb used that appears on a person's head.

The definition for a function is a relation for which each element of the domain corresponds to exactly one element of the range.

• The graph on the left is a function because for every x-value, only 1 y-value responds and it passes the vertical line test.

The definition for a relation is a set of ordered pairs.

• The graph on the right is a relation. This graph is only a relation and not a function because the x-value hits the graph at 2 point which shows that it didn't pass the vertical line test.

Ch 1 Real World Function

For my real world function I decided to do mines on one phone number goes to one person. The domain for this function is ( 511,777-3333,596-3700) . The range is the (Info. place, Oakland police department, Emerville police department). Definition for function is a relation that associates each value in the domain with exactly one value in the range. The first graph to the left is a function because there is exactly one domain for each one range. Not a function would be that if your phone is acting up and when you call one person your phone is calling three people at the same time when you only dialed one number. As you can see there is a second graph and the second graph isn't a function because there is only one domain for all the ranges. Definition of a relation is a set of ordered pairs of real numbers. The independent variable in this function is the phone number that you are dialing. The dependent variable is the person who picks up.

Ch 1 Real World Functions

Definitions:

Relation: a set of ordered pairs
Function: is a relation meaning each domain will have a range.

The graph on the left shows the domain of language classes and the range as the language spoken in class. The independent variable will be the language class and the dependent variable will be the language. This graph shows that each domain (spanish class, cantonese class, french class, and german class) will have one range ( spanish, cantonese, french and german).

The graph on the right shows the same thing as the left but there is one domain that have two ranges. Which is called a relation. Cantonese class have Cantonese and French being spoken.