Posted by Kelsey on Saturday, September 1, 2012 at 5:10pm.
Find the value of y for a given value of x, if y varies directly with x.
If y = –252 when x = 84, what is y when x = 74?

Math  Steve, Sunday, September 2, 2012 at 2:09pm
y = kx
252 = k(84)
k = 3
y(74) = 3(74) = 222

Math  BeckyG, Wednesday, September 28, 2016 at 10:37am
Do the same thing with X 6, 18, 54, 162
Y 24, 72, 216, 640
2.52 = k(8.4)
K=0.03
Y(2.7)=0.03(2.7)=0.81
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