Question

20. Determine the rate of change for the following equation on the given interval.

f(x) = 2x + 7 on the interval -2 <( underlined) x < ( underlined) 3

A) 2



B) -2



C) 10



D) -10

Answer 1

-2<x<3   | *2
-4<2x<6       | +7
3< 2x+7< 13


3<10<13

The answer is C

Answer 2

The equation is of a line so the rate of change is the same all along it. The rate of change is just the slope of the line = 2.