Research finds that the more frequently you brush your teeth, the less likely you are to develop cavities that will need to be filled. this relationship between variables depicts a: a) negative correlation. b) positive correlation. c) bimodal set. d) quasi-experimental finding.

a) Negative correlation

Explanation:

Negative correlation is a term which basically explains a relationship between to variables in which increase in one variable causes a decrease in the other variable and vice versa. As in the given scenario, the more frequently the teeths are brushed ( variable is increasing ) the less likely is the chance to develop cavities (variable is decreasing)

Hence a)negative correlation is the right answer.