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September 22, 2014

September 22, 2014

Posted by **Anonymous** on Thursday, September 29, 2011 at 1:13pm.

Write an inverse variation equation. If y varies inversely with x and y=2 when x=4….

a. Find K.

b. Write a general equation.

c. Use your equation to find y when x=8

Draw a chart to show at least 5 ordered pairs that are on the graph. (Hint: don’t pick all positive numbers)

x- y-

- algebra -
**Steve**, Thursday, September 29, 2011 at 3:09pmSince you know about k, you must surely have grasped the idea that if y varies directly with x, then

y = kx

You know that y=2 when x=4, so

2 = k*4

k=1/2

... the rest should be easy. Just use your fancy new equation.

y = x/2

8/2 = 4, so y=4 when x=8

x: -21 -3.4 0 π 6

y: -21/2 -1.7 0 π/2 3

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