Answer:
Evaluate:
-
- 
Factor:
Step-by-step explanation:
The independent variable is is the price per bag.
This relation is a function. This is because no x value is repeated, so it passes the vertical line test.
Here is an example of where a relation is NOT a function:
{(2, 5), (3, –5), (2, 5), (5, –5)}
Hope this helps!
