Question

Evaluate the function f(x) = 2x + 2, when x = –1.

4 ♥
–4
3
0

Check my answer Please. "♥" marks what i chose

Answer 1

What is 2 * (-1) = ?

Answer 2

Replace x with -1

2(-1)+2

Answer 3

f(x) = 2x + 2

f(-1) = 2 * (-1) + 2

Calculate the right side above.

Answer 4

-2 - 2 = 0 ?

Answer 5

No.
-2 - 2 = -4

Here the problem is
f(-1) = 2 * (-1) + 2
First you do 2 * (-1) which is -2
Then you add -2 to 2

f(-1) = 2 * (-1) + 2
= -2 + 2
= 0

That means f(-1) = 0
The correct answer is choice D.