Question

The graph of a proportional relationship passes through the points (4,3) and (x,9). Find x.

x=?

Answer 1

x=12

Explanation:

Answer 2

Explanation:

If x and y are proportional, then y : x = constant.

x=12

We have (4, 3) and (x, 9). Substitute:

cross multiply

divide both sides by 3