y is directly proportional to the cube of x. If x is increased by 50% show that the percentage increase in y is 237.5%

Answer 1

Use law of exponents
(ax)^b = a^b × x^b

y=kx^3
y1=k(1.5x)³=k(1.5^3)x³=3.375kx³=...

Answer 2

I have no idea

Answer 3

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