Question

If y varies directly with x and y = 9 when x = 3, find y when x = 1.

Write and solve a direct variation equation to find the answer
What does y=?

Answer 1

Equation: y = 3x

y = 3

Explanation:

y ∝ x

y = Kx

9 = 3K

K = 9/3 = 3 Substitute y and x value to find K

y = 3x

Equation: y = 3x

x = 1

y = 3(1)

y = 3

Hope this helps!