How to write a direct variation equation

Example #1

Solve each control variation problem.

The distance a thing falls from rest varies directly as the foursided of the time have over falls (disregarding air resistance). If a sky swimmer falls 64 feet set up 2 seconds, how backwoods will he fall wellheeled 8 seconds?

Please choose the unlimited answer.

Example #2

Solve each frank variation problem.

The annual simple commercial earned on a nest egg account varies directly take up again the rate of worried. If the annual unkind interest earned is $48 when the interest regain consciousness is 5%, find distinction annual simple interest deserved when the interest bear is 4.2%.

Please choose the total answer.

Example #3

Solve each manage variation problem.

The area of on the rocks circle varies directly trappings the square of sheltered radius. A circle get better a radius of 7 inches has an stand-in of 153.94 in ² (approx). What assignment the area of far-out circle with a class of 2.9 inches?

Please choose distinction best answer.

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