Question

The graph of a proportional relationship passes through the points (56,72) and (7,y). Find y.

Answer 1

y = 9

Explanation:

Writing the equation of two ratios, we get:

7 y

------ = ------

56 72

7*72

Taking the cross product, 7(72) = 56(y), or y = --------

56

... which reduces to y = 72/8, or y = 9