Question

find f(-2) when f(x)=9x - 7.
a. 2
b. -11
c. -25
d. -4

Explanation:

Step1: Substitute \( x = -2 \) into \( f(x) \)

We have the function \( f(x) = 9x - 7 \). To find \( f(-2) \), we replace \( x \) with \( -2 \) in the function. So we get \( f(-2)=9\times(-2)-7 \).

Step2: Calculate the expression

First, calculate \( 9\times(-2) \), which is equal to \( -18 \). Then we have \( -18 - 7 \). Subtracting these two numbers, \( -18-7=-25 \).

Answer:

C. \( -25 \)