Question

What is the direct variation equation iffy varies directly with x and y = 12 when x= 6

Answer 1

y = 2x

Explanation:

Given that y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 12 when x = 6

k =
`(y)/(x)` =
`(12)/(6)` = 2, hence

y = 2x ← equation of variation