Mathematics
MarniOrne135
2016-04-20 21:33:27
Suppose y varies directly with x. If y = –4 when x = 8, what is the equation of direct variation? Complete the steps to write the equation of direct variation.
ANSWERS
MaliaXayachack
2016-04-21 04:30:06

Direct variation is of the form y=kx.  We are given the point (8, -4) so we can solve for k, the constant of variation... -4=8k, divide both sides by 8 -4/8=k k=-0.5, so our equation is: y=-0.5x, 

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