Math Is Fun Forum

Spanky

Member

Registered: 2010-02-24

Posts: 62

Direct Variation Word Problem

The number of pesos varies directly as the number of dollars exchanged. In 2000, one could exchange 30 dollars for 249.78 pesos.  What was the constant of variation (exchange rate) at that time?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Direct Variation Word Problem

Hi Spanky;

30 k = 249.78

k = 8.326

1 dollar to 8.326 pesos

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Spanky

Member

Registered: 2010-02-24

Posts: 62

Re: Direct Variation Word Problem

Thank you, That was very helpful.  I understand it now.