SOLUTION: y varies directly as the square of R. If y = 196 when R = 7 find y when R - 3

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Question 328211: y varies directly as the square of R. If y = 196 when R = 7 find y when R - 3
Answer by Alan3354(69443) About Me  (Show Source):
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y varies directly as the square of R. If y = 196 when R = 7 find y when R - 3
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I suppose you mean when R = 3.
y = kR^2
196 = k*7^2 = 49k
k = 4
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@R = 3, y = 4*3^2 = 36