Find y when x=9 if y varies directly as x, and y=245 when x=7

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asked Sep 1, 2015 137k views

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Russellpierce · Answer 1 · 2015-09-07T11:36:18+0000

Since y varies directly as x, you know that y=245 and x=7 can be used as a proportion, 245/7. When you multiply this proportion to 9, you get 315. This is the value of y when x=9.

y=315

Find y when x=9 if y varies directly as x, and y=245 when x=7

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