Question

What is the value of f(-1) when f(x) = 2x + 3

A 5
B -1
C -5
D 1

Answer 1

D

Explanation:

f(x) = 2x + 3

f(-1) = 2(-1) + 3

= -2 + 3

= 1

Answer 2

F(-1) means to replace x in the equation with -1 then solve.

2(-1) + 3 = 1

The answer would be D. 1