Question

For what value of k will the points (3,5) and (9,k) represent a proportional relationship?

Answer 1

k = 15

Explanation:

For a proportional relationship to exist then for both points

k =
`(y)/(x)` ← k is the constant of proportion, that is

`(5)/(3)` =
`(k)/(9)` ( cross- multiply )

3k = 45 ( divide both sides by 3 )

k = 15