Question

Please help... thx

A college professor inputs test scores for the first two Tests of the semester to determine the correlation. The scatterplot for the test scores is shown, along with the line of best fit. Choose the best estimation for r, the correlation coefficient.

A) -0.70
B) -0.30
C) 0.30
D) 0.70

Answer 1

D) 0.70

Explanation:

D) 0.70 is correct. As the grades for Test 1 increased, the grades for Test 2 also increased, therefore the trend of the data is positive.

The correlation coefficient is positive, and since the points are close to collinear, D) 0.70 is the best choice.

Hope this helps, have a good day. c;