Question

Use the following function rule to find f(-1).
f(x) = -11 + 8x
f(-1) =?

Answer 1

f(-1) = -19

Explanation:

Using the equation

(f(x) = -11 + 8x) we use f(-1) into it.

f(-1) = -11 + 8(-1)

f(-1) = -11 -8

f(-1) = -19

Answer 2

-19

Explanation:

f(x) = -11 + 8x

f(-1) =-11 + 8(-1)

= -11 -8

= -19