Question

Write the equation for the following relation. E = {(x, y): (2, 15), (5, 30), (8, 45), . . .}

Answer 1

y = 5x + 5

If y = mx + c,

m = change in y/change in x

m = 15/3

m = 5

y = 5x + c
Using the point (2,15):

(15)=5(2)+c
c = 15-10
c=5

so y = 5x + 5