Answer:
(a) F(0)=80 represents the original value of the gift card
(c) F(10)=27.5 represents the remaining value in dollars of the gift card after Jeremy purchased 10 comic books
(e) F(15)=1.25 represents the remaining value in dollars of the gift card after Jeremy purchased 15 comic books
Step-by-step explanation:
Given the gift card amount remaining is f(x) = -5.25x +80, you want to know the true statements about f(0), f(10), f(15).
Evaluation
The function is evaluated by putting its argument where x is, then doing the arithmetic.
f(0) = -5.25·0 +80 = 80
f(10) = -5.25·10 +80 = -52.50 +80 = 27.50
f(15) = -5.25·15 +80 = -78.75 +80 = 1.25
The true statements are ...
f(0) = 80, choice A
f(10) = 27.50, choice C
f(15) = 1.25, choice E
