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 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

According to the given equation, for each hour of tutoring, the grade increases by 5 points. Therefore, for 5 hours of tutoring, the total increase in grade would be 5 x 5 = 25, and the expected grade would be 60 + 25 = 85. Option A is not true because a 5 point increase per hour is a significant improvement. Option B is not true because it is not possible for a grade to be zero if no tutoring is done. Option D is not true because a linear equation with a constant slope indicates a strong relationship between the two variables.

Suppose an Economist Discovers That the Relationship Between Grades and Hours