Question

Suppose that y varies directly with x, and y=4 when x=20. (a) Write a direct variation equation that relates x and y. Equation: (b) Find y when x = 9. y =​

Answer 1

Explanation:

y = kx

a. Because x and y vary directly, the equation is in the form y = kx.

FOR YOUR UNDERSTANDING WAY

The ratio of y to x would be 4/20 = 1/5. So the equation would be y=1/5x