# Change in variables with direct and inverse proportions.

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X varies directly as the square of s and inversely as t. How does x change when s is doubled? When both s and t are doubled?

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The change in variables with direct and inverse proportions is examined.

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(I have attached a MS Word document solution also.)

(s^2 is the same as s squared.)

To say x varies directly as the square of s and inversely as t is to say that x is proportional to s^2/t.

So x = k s^2/t, where k is some constant (this is ...

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