Which of the following situations represents a linear relationship? a. a radioactive substance loses half of its mass every 12 years. b. the volume of a cubical gift box depends on the side length of the box. c. the cost of living increases in a certain area by 3 percent each year. d. susie is losing 5 pounds every month on her diet.

A. A radioactive substance loses half of its mass every 12 years.

Half of mass loses every 12 years. So there is no common difference. Its an exponential relationship.

B. The volume of a cubical gift box depends on the side length of the box.

The volume of the box depends on the length , width and height of the box.

It does not depends on single side. So its not a linear .

C. The cost of living increases in a certain area by 3 percent each year

The cost of living increases by 3%. So there is no constant change every year.Hence it is not a linear

D. Susie is losing 5 pounds every month on her diet.

Susie losing 5 pounds every month. that is constant for every month. Rate of change is constant so it is a linear relationship.

probably the last option

step-by-step explanation:

i can not answer the question due to the fact that you spelled "carton" as "cartoon", a cartoon is something you watch on tv, a carton is a box that holds things. and also you've been waiting for this question for a while so why don't you get off your lazy a** and try to figure it out for yourself for once!

step-by-step explanation:

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look above, and leave your comments down below, and don't for get a five stars and a and brainliest xd

sorry for the stars in the middle of words its because it wouldn't let me submit. xd