If y varies directly as x, and y = 15 as x = -3, find y for the x-value of 4.

Mathematics
Tutor: None Selected Time limit: 1 Day

help please

Jan 5th, 2015

y =mx

m = 15/(-3) = -5

y = -5x

when x= 4, y = (-5)*4= -20

Answer: -20

Jan 5th, 2015

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