Question

Which of the following functions f(x) represent the order pairs:

{(-2,-7), (-1,-4), (0,-1), (1,2), (2,5)

A.f(x)=2x
B.f(x)=3x-1
C.f(x)=-3x+5
D.f(x)=3x+5

Answer 1

B.f(x) = 3x-1

Explanation:

{(-2,-7), (-1,-4), (0,-1), (1,2), (2,5) are solutions of f(x) = 3x-1

Plug in

(-2,-7): f(x) = 3(-2) -1 = -6 - 1 = -7

(-1,-4): f(x) = 3(-1) -1 = -3 - 1 = -4

(0,-1): f(x) = 3(0) -1 = - 1

(1,2): f(x) = 3(1) -1 = 3 - 1 = 2

(2,5): f(x) = 3(2) -1 = 6 - 1 = 5