SOLUTION: Find the constant of variation k for the inverse variation. Then write an equation for the inverse variation. y = 2.5 when x = 9

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Question 934517: Find the constant of variation k for the inverse variation. Then write an equation for the inverse variation.
y = 2.5 when x = 9
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Find the constant of variation k for the inverse variation.
y=k%2Fx...the inverse variation
if y+=+2.5=5%2F2 when x+=+9, then we have
you can use y+=+2.5 or y+=5%2F2
5%2F2=k%2F9
5%2F2%2A9=k
45%2F2=k
so, equation is:
y=%2845%2F2%29%2Fx
y=45%2F2x or in case you use use +2.5 you will have y=22.5%2Fx