Question

This graph shows a proportional relationship.

What is the constant of proportionality?

Enter your answer in the box.

Answer 1

45

Explanation:

y = kx where 'k' is the constant of proportionality

'k' can be found using the same method to find slope:

(3, 135) (5, 225)

k = (225-135) / (5-3)

k = 90 / 2

k = 45