SOLUTION: y varies directly as the square of R. If y = 12 when R = 2, when R =4, y =

Algebra ->  Graphs -> SOLUTION: y varies directly as the square of R. If y = 12 when R = 2, when R =4, y =      Log On


   

Question 326454: y varies directly as the square of R. If y = 12 when R = 2, when R =4, y =
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
y varies directly as the square of R. If y = 12 when R = 2, when R =4, y =
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y = kR^2
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Solve for k using y=12 when R = 2
12 = k(2^2)
k = 3
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General equation:
y = 3R^2
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Solve for y when R = 4.
y = 3*4^2
y = 3*16
y = 48
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Cheers,
stan H.