## Which of the following equations is NOT an example of inverse variation? 1. f(x) = kx 11. f(x) = 2k/x III. f(x) =-kx

Question

Which of the following equations is NOT an example of inverse

variation?

1. f(x) = kx

11. f(x) = 2k/x

III. f(x) =-kx/z

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Mathematics
22 hours
2021-07-23T00:16:47+00:00
2021-07-23T00:16:47+00:00 1 Answers
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## Answers ( )

Answer:i and iii are not examples of inverse variation.

Step-by-step explanation:Inverse variation between two variables, y and x, is written as:

y = k/x

This means that, as the absolute value of x increases, the absolute value of y decreases.

So we need to have the variable in the denominator.

Let’s analyze the given options:

i) f(x) = k*x

Here, x is not in the denominator, this is a direct variation, so this is not an example of inverse variation.

ii) f(x) = 2k/x

Here we can see that the variable x is in the denominator, thus, this is an inverse variation.

iii) f(x) = -k*x/z

We can see that we have z in the denominator, but you can see that the variable is x, and x is in the numerator, thus, this is not an example of inverse variation.

We can conclude that:

f(x) = kx

and

f(x) =-kx/z

Are not examples of inverse variation.