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 -
**Becky-G**, 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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