Question

Y is directly proportional to x.
when y=30, x=6
work out an equation connecting y and x

Answer 1

y=5x

Explanation:

30 divide by 6 = 5 so y = 5x

Answer 2

y = 5x

Explanation:

Use the direct variation equation y = kx

Plug in 30 as y and 6 as x, then solve for k

y = kx

30 = k(6)

5 = k

Plug in 5 as k into y = kx

y = 5x

So, the equation relating x and y is y = 5x