Question

If y varies directly with x, and If y = 2.5 when x = 0.5, how do you find y when x = 20?

Answer 1

When `x=20; y=100`

Explanation:

`y prop x :. y = k*x or k =y/x = 2.5/0.5=5` (k is proportionality costant) When `x=20 ; y =5*20=100` [Ans]