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 = - 0.0578x + 2.9439 (b) Interpret the slope For each additional hour that a student spends playing video games in a week, the grade-point average will by points, on average (c) If appropriate, interpret the y-intercept