Question

Find an equation of variation where y varies directly as x and y = 0.8 when x = 0.4

Answer 1

Answer:

y = 2x

Step-by-step explanation:

Given that y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 0.8 when x = 0.4

k = $\frac{y}{x}$ = $\frac{0.8}{0.4}$ = 2

y = 2x ← equation of variation