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# If y varies directly as the square of x,and y=24 when x=4,find the constant of variation

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Y varies directly as the square of x means:

y = kx^2

Where,

k is the constant of variation. You can use any letter except y or x for constant

Put values of y and x: (24) = k * (4)^2

k = 24/(4*4) = 24/16 = 3/2 = 1.5

Answer: The constant of variation is 1.5

Posted on Nov 04, 2010

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The constant variation is 6

Posted on Nov 04, 2010

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Between x1=2 to x2=3, y varies from y1=5*2+4=14 to y2=5*3+4=19.
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No need for a claculator to understand these concepts.
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