Question

Graduation rate is one measure used to compare colleges in national publications. One such publication compared semester tuition against graduation rate, defined as the percentage of students who graduate within four years. The value of r for the scatterplot is 0.856.

Which of the following is an appropriate summary of the scatterplot?
There is no relationship between tuition and graduation rate.
Colleges with lower tuition tend to have higher graduation rates.
Colleges with higher tuition tend to have higher graduation rates.
There is a weak, positive relationship between tuition and graduation rate.

Answer 1

Answer: Based on the value of r being 0.856, which is close to 1, there is a strong positive relationship between tuition and graduation rate. Therefore, the appropriate summary of the scatterplot is:

"Colleges with higher tuition tend to have higher graduation rates."

Explanation: