Question

For the direct variation y = 3 when x = -2, how do you find the constant of variation and find the value of y when x = 3?

Answer 1

`y = -4.5`

Explanation:

`y prop x or y = k *x ; y=3 , x = -2 :. 3 = -2*k or`

`k = -3/2 :. y = -3/2 *x ; k` is known as constant of variation.

`x =3 , y = ? y = -3/2 *x :. y = -3/2 *3 =-9/2 = -4.5`

`y = -4.5` [Ans]