Suppose an economist discovers that the relationship between grades and hours of tutoring is grade = 60 + 5(hours). Based on the equation, which statement is TRUE?
A) Tutoring is not worthwhile because each hour raises the grade by only 5 points.
B) If no tutoring is done, then the grade will be zero.
C) The expected grade with 5 hours of tutoring is 85.
D) The relationship between tutoring and grades is weak.

Question

Quizplus · Accepted Answer

The equation suggests that for each hour of tutoring, the grade increases by 5 points. Therefore, if a student receives 5 hours of tutoring, the grade would be 85 (60 + 5(5)). Option A is false because any increase in grade is positive, and tutoring can still be beneficial regardless of the amount of increase. Option B is false because a grade of zero is not possible in this equation since there is a constant term of 60. Option D is false because the equation shows a clear and consistent relationship between tutoring and grades.

Suppose an Economist Discovers That the Relationship Between Grades and Hours