Question

Which of the following equations is NOT an example of inverse variation?
I. f(x)=kx
II. f(x)=2kx
f
(
x
)
=
2
k
x
III. f(x)=−kxz

Answer 1

Based on the equation,the equation which is not an inverse variation is f(x) = kx

Inverse variation

f(x) = kx

= k × x

f(x) = 2k/x

= k(2/x)

f(x) = -kx/z

= k(-x/z)

Inverse variation is given by:

y = k(1/x)

where,

• k = constant of proportionality

Therefore, f(x) = kx is not an inverse variation.

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