Question

How does f(x) = 5x change over the interval from x = 7 to x = 8?

A) f(x) increases by 5

B) f(x) decreases by 5

C) f(x) increases by a factor of 5

D) f(x) decreases by a factor of 5

Answer 1

the answer is a

Explanation:

5x7= 35, 5x8= 40 40-35=5

Answer 2

f(x) increases by five, because f(7) is 35 and f(8) is 40.