Using proportionality of variables, it is found that they are classified as positive, hence option B is correct.
What is the proportionality of variables?
- When two variables move in the same direction, their relation is called direct or positive.
- When two variables move in the different directions, their relation is called inverse or negative.
- If they are independent, they are neutral.
In this problem, they move in the same direction, thus they are classified as positive and option B is correct.
More can be learned about proportionality of variables at https://brainly.com/question/1266676
