(10 Points A teacher has modelled students' grades based on the number of hours of independent study throughout the semester. She has used linear regression analysis and found out that the grade can be modelled by: Y = 3.15 x + 18.5 a. Interpret the value 18.5 in this case/scenario (2.5 points). b. Interpret the value 3.15 in this case/scenario (2.5 points). Predict a grade for a student who has studied 12 hours. (2.5 points). c. d. What are this model's limits? (2.5 points) 10 minutes on slide