superspencerd
superspencerd superspencerd
  • 07-11-2018
  • Mathematics
contestada

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)

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jimrgrant1 jimrgrant1
  • 07-11-2018

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 = [tex]\frac{y}{x}[/tex] = [tex]\frac{24}{3}[/tex] = 8

y = 8x


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deboada35
deboada35 deboada35
  • 07-11-2018

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

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