Which relation is NOT a function? A {(a, x),(b, y),(a, w),(c, z)} B {(a, x),(b, y),(d, x),(c, z)} C {(a, x),(b, x),(d, z),(c, z)} D {(a, y),(b, y),(d, y),(c, y)}

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10