## Saturday, November 12, 2011

### 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.

#### 1 comment:

Rori Abernethy said...

16/20. Talk a little more about the domain and range in this blog entry. I think you want to use the words"clippers" and "clipper settings"