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Find the constant of variation k for the inverse variation. Then write an equation for the inverse variation.

y = 5 when x = 7.5

User BigMiner
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2 Answers

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An inverse equation follows the formula

y=kxYou're given y=5 ,
x=7.5
plug these values into your equation.
5=k7.5
solve for k.
k=5(7.5)k=37.5
rewrite equation y=37.5x
and now we can check to see if our values are correct
5=37.5/7.5
=5


Hope this helps
User NobodyMan
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8.8k points
2 votes

Answer: The required constant of inverse variation is 37.5 and equation for the inverse variation is
yx=37.5.

Step-by-step explanation: We are given to find the constant of inverse variation and to write an equation for the following inverse variation :

y = 5 when x = 7.5.

Let k denote the constant of inverse variation.

According to the given information, we can write


y\propto(1)/(x)\\\\\\\Rightarrow y=(k)/(x)~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{k is the constant of inverse variation}]\\\\\Rightarrow yx=k~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

When y = 5, x= 7.5, then from equation (i), we get


5*7.5=k\\\\\Rightarrow k=37.5.

Substituting the value of k in equation (i), we arrive at


yx=37.5.

Thus, the required constant of inverse variation is 37.5 and equation for the inverse variation is
yx=37.5.

User Sudhanshu Vohra
by
8.0k points

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