Question

The variables x and y are proportional. Use the values to find the constant of proportionality. Then write an equation that relates x and y.

When y=72 and x=3.

K = ?

y = ?

Answer 1

k = 24, y = 24x

Explanation:

Given x and y are proportional then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition when y = 72, x = 3 , then

72 = 3k ( divide both sides by 3 )

k = 24

y = 24x ← equation of proportion