Question

Write a function rule based on the table below.

x f(x)
0 -4
2 2
4 8

a. f(x) = 6x-4
b. f(x) = 3x-4
c. f(x) = -6x+4
d. f(x) = -4x

Answer 1

To find a function that represents these values, just substitute x-values in and look for a function that gives you the correct f(x).

A) This works for 0, but not 2
B) This works for 0, 2, and 4 making it the right answer.