SOLUTION: The variables x and y vary directly. Use the given values to write an equation that relates x and y: x = 4, y = -16

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Question 627905: The variables x and y vary directly. Use the given values to write an equation that relates x and y:
x = 4, y = -16
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

The variables x and y vary directly

 y = kx

-16 = k·4   || when  x = 4, y = -16

 -4 = k

 y = -4x