Question

If y varies directly as x and x=3 when y=12, find x when y=3

Answer 1

Answer:

y = 4x

Explanation:

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

y = kx ← k is the constant of variation

To find k use the condition x = 3 when y = 12

k = = = 4

y = 4x ← equation of variation