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1 If y = 7 when x= 3, find y when x=5, given that y varies directly with x.

1 If y = 7 when x= 3, find y when x=5, given that y varies directly with x.
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If y = 7 when x= 3, find y when x=5, given that y varies directly with x.

1 If y = 7 when x= 3, find y when x=5, given that y varies directly with x.-example-1
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User Eli Bendersky
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8.2k points

1 Answer

3 votes

Answer:

y1/x1 = y2/x2 ⇒

y2 = (x2/x1) y1

Plug in

x1 = 3

y1 = 7

x2 = 7

and get y2.

answered
User Do Will
by
8.6k points
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