Question

Given that x and y vary directly, write the equation relating x and y if x = 3 when y = 24. A) y = 8x B) xy = 8 C) y = 8 x D) y = x 8 4)

Answer 1

A

given that y varies directly as x, then the relationship is

y = kx ← k is the constant of variation

To find k use the given condition x = 3 when y = 24

y = kx ⇒ k = $\frac{y}{x}$ = $\frac{24}{3}$ = 8

y = 8x

Answer 2

as x and y vary directly, then  if x = 3 and y = 24 , the option A IS THE CORRECT, Y = 8X, y = 8*3 =  24