If y varies directly as x, and y = 16 as x = 4, find y for the x-value of 2.

Mathematics
Tutor: None Selected Time limit: 1 Day

i don't understand, please help! 

Jan 5th, 2015

y=ax-----------assume a constant variation a

therefore,

16=4a

a=4

y=ax

y=4*2

y=8

Jan 5th, 2015

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