Question

Write an equation in the form y=kx for the following graph:

Answer 1

k = 5 → y = 5x

Explanation:

From the graph:

For x = 5 we have y = 10

For x = 10 we have y = 20

For x = 15 we have y = 30

....

x = 5, y = 10 substitute to y = kx:

10 = k(5) divide both sides by 2

5 = k