Question

4. Suppose y varies directly with x. Write a direct variation equation that relates x and y.

Answer 1

Answer:

y = - 5x

Step-by-step explanation:

Given that 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 = - 10 when x = 2, thus

k = $\frac{y}{x}$ = $\frac{-10}{2}$ = - 5

y = - 5x ← equation of variation