A student at a junior college conducted a survey of 20 rando

A student at a junior college conducted a survey of 20 randomly selected full-time students to determine the relation between the number of hours of video game playing each week, x, and grade-point average, y. She found that a linear relation exists between the two variables. The least-squares regression line that describes this relation is y= -0.0526x + 2.9216. Predict the grade-point average of a student who plays video games 8 hours per week. Interpret the slope. If appropriate, interpret the y-intercept. A student who plays video games 7 hours per week has a grade-point average of 2.66. Is the student\'s grade-point average above or below average among all students who play video games 7 hours per week?

Solution

a) 2.5075

b) decrease

c) A

d) above