D Question 6 1 pts 6-8. Given the regression equation Grade = 6.5(hours spent on essay) + 38 r=.8 What is the best interpretation of the slope? On average, the grade for a student studying zero hours is a 6.5 On average, the grade is increasing by 6.5 points per hour spent on an essay On average, the grade is increasing by 38 points per hour spent on an essay On average, the grade for a student studying zero hours is a 38 D Question 7 1 pts 6-8. Given the regression equation Grade - 6.5(hours spent on essay ) + 38 r= .8 What is the best description of the coefficient of determination? 64% of the increase in hours spent on the essay can be associated with the increase in grade There is a strong positive linear correlation between the hours spent on the essay and the grade. There is a weak positive linear correlation between the hours spent on the essay and the grade 64% of the increase in grade can be associated with the hours spent on the essay