Question

How to find the direct variation of x=2, y=8

Answer 1

y=4x is the answer :)

Answer 2

y = 4x

Explanation:

Given that y and x vary directly then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition that x = 2, y = 8

8 = 2k ( divide both sides by 2 )

4 = k, thus

y = 4x ← equation of variation