Question

If y varies directly with x and y is 18 when x is 6, what is the constant of variation?

Answer 1

k = 3

Explanation:

Given y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 18 when x = 6 , then

18 = 6k ( divide both sides by 6 )

3 = k