Question

a scatterplot is produced to compare the number of hours that students study to their test scores. there are 25 data points, each representing a different student. the scatterplot shows a grouping of points rising from left to right. which statement could be true?
there is no relationship between the number of hours that students study and their test scores because the scatterplot does not have a cluster.
as the number of hours of studying increases, test scores decrease because the scatterplot has a cluster that increases from left to right.
as the number of hours of studying increases, test scores increase because the scatterplot has a cluster that increases from left to right.
the number of hours that students study is equal to the test scores because the scatterplot does not show a cluster.

Explanation:

A scatter - plot with points rising from left to right indicates a positive correlation. In a positive correlation, as one variable (number of study hours) increases, the other variable (test scores) also increases.

Answer:

As the number of hours of studying increases, test scores increase because the scatterplot has a cluster that increases from left to right.