Question

The point (2, 18) is an ordered pair in a proportional relationship. What equations represents this relationship?

y = 1/9x

y = 18x

y = 9x

y = 2x

Answer 1

y = 9x

Explanation:

If you plug in the point into each equation, you get:

y = 1/9x

18 = 1/9 * 2

18 = 2/9

not true

y = 18x

18 = 18 * 2

18 = 36

not true

y = 9x

18 = 9 * 2

18 = 18

true, so this is the answer

y = 2x

18 = 2 * 2

18 = 4

not true