Asked by Victoria

A food order at a restaurant is paid for with a $10 bill. What function represents the difference between the cost of the food and the change returned? Assume that this difference is nonnegative.

A: f(x) = |2x -10|
Answered by Damon
Huh
f(x) = 10 - x
Answered by Victoria
How did you end up with that answer?
Answered by Damon
I misread it
cost = 10 - change
cost - change = 10 - 2 change
Answered by Victoria
How would I graph this?
Answered by Damon
just put in a bunch of cost values from 0 to 10
if the cost were $2
change = 8
cost - change = 2 - 8 = -6
and
10 - 2(8) = -6

It is only non-negative if the cost is between 5 and 10
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