Question

Given that y varies directly with x, and x = 8, y = -3, how do you write a direct variation equation that relates x and y?

Answer 1

The direct variation equation is `8y = -3x`

Explanation:

`y prop x :. y= k*x ; x=8 ; y= -3 :. -3 =k*8 or k= -3/8`So the direct variation equation is `y = -3/8*x or 8y = -3x`[Ans]