Question

Identify each function for which f (2) = 3.
.

A
f(x)= - 1/2x + 7/2
​

B
f(x)=1/2x + 3/2
​

C
f(x)= 2x^2 - 3x + 1
D
f(x) = 2x - 1

Answer 1

Compute f(2) for each:

A: f(2) = -1/2(2) + 7/2 = -1 + 7/2 = 5/2 ≠ 3
B: f(2) = 1/2(2) + 3/2 = 1 + 3/2 = 5/2 ≠ 3
C: f(2) = 2(2)^2 - 3(2) + 1 = 8 - 6 + 1 = 3
D: f(2) = 2(2) - 1 = 4 - 1 = 3

So functions C and D satisfy f(2) = 3.