Question

If y varies directly as x and y = 270 when x = 15, how do you find y when x = 19?

Answer 1

Direct Variation uses the equation: `y=kx`, where k is the constant of variation

Explanation:

`y = kx`

`270=k(15)`, so
`k=270/15=18`

Direct Variation equation: `y=18x`

`y(19)=18(19)=342`

hope that helped