Which rule describes a linear relation?

a) double x and subtract five to get y.

b) multiply x and y to get 20.

c) multiply x times itself and add five to get y.

d) divide 40 by x to get y.

A, B and D

Step-by-step explanation:

A linear relationship is one in which when the variables are plotted, the graph would be a straight line. In a linear relationship, the highest power of the variables is 1. We would compare each of the given relations.

A) Double x and subtract five to get y. This is expressed as

2x - 5. It is a linear relationship.

B) Multiply x and y to get 20. This is expressed as

xy = 20. It is a linear relationship.

C) Multiply x times itself and add five to get y. This is expressed as

x^2 = y. It is not a linear relationship. The highest power of the variables is 2

D)Divide 40 by x to get y. This is expressed as

40/x = y. It is a linear relationship.

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