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March 3, 2015

March 3, 2015

Posted by **Shin** on Thursday, April 28, 2011 at 2:43pm.

W (pounds 2 6 9 15

D (inches) 1.6 4.8 7.2 12

(a.) Do the data represent direct or inverse variation?

Explain. (b.) Find an equation that models the data.

(c.) How far will the spring stretc if an 11- pound weight is hung on it, as depicted in the figure?

- College Math -
**MathMate**, Thursday, April 28, 2011 at 3:30pm(a) when the ratios are proportional they represent direct variation.

For example: 1.5/2 = 4.8/6 = 7.2/9 = 12/15 = 0.8

Guess at this point you can figure out the equation required for (b).

(c) substitute W=11 into the equation in (b).

Post for checking if you wish.

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