Which of the following represent inverse variation? Select all that apply.

Question

xy=12
x y is equal to 12

y=4x
y is equal to 4 over x

y=−7x
y is equal to negative 7 x

x=9y
x is equal to 9 y

y=x8

answer CORRECTLY

Answer 1

The correct answers are:

y is equal to 4 over x
y is equal to negative 7x
x is equal to 9y

Answer 2

Choose whether each situation represents a direct variation or inverse variation.

Direct Variation Inverse Variation
xy=27
Direct Variation – x over y is equal to 27
Inverse Variation – x over y is equal to 27
The cost per fitness class at a gym that costs $13 a month with unlimited classes included.
Direct Variation – The cost per fitness class at a gym that costs $13 a month with unlimited classes included.
Inverse Variation – The cost per fitness class at a gym that costs $13 a month with unlimited classes included.
5y=x
Direct Variation – 5 y is equal to x
Inverse Variation – 5 y is equal to x
yx=−42
Direct Variation – y over x is equal to negative 42
Inverse Variation – y over x is equal to negative 42
It costs $30 per piano lesson

answer CORRECTLY

Answer 3

Direct Variation - xy=27
Inverse Variation - The cost per fitness class at a gym that costs $13 a month with unlimited classes included.
Direct Variation - 5y=x
Inverse Variation - yx=−42
Direct Variation - It costs $30 per piano lesson