Question

Find the variation constant and an equation of variation where y varies directly as x and y = 15 when x= 3.

The variation constant is k =
The equation of variation is y=

Answer 1

The variation constant is
`k=5`

The equation of variation is
`y=5x`

Explanation:

`y=kx\\15=k(3)\\15=3k\\5=k`

`y=5x`