Question

Given the function f(x) = −2x + 8, find x if f(x) = 22.

−36

−7

52

−15

Answer 1

22 = -2x + 8
14 = -2x
x = -7

Answer 2

f(x) is another way of saying y, but it allows us to differentiate between multiple functions, it also can be used to point out specific points in a function.

by setting f(x) = 22
we are setting y = 22

y =-2x + 8
22 = -2x + 8