A sample of 10 students was taken from a history class. Their final exam scores, y, and the number of hours they studied, x, before the exam was noted. The least-squares regression line is given to be y = 4.82x +56.56 Interpret the y-intercept. O If a student does not study at all, then the final exam score is expected to be 56.56 points. O A student would get 56.56 on the final exam if the number of hours studied is 4.82 hours. O For each additional hour of studying, the final exam score increases by 56.56 points on average. O For each additional hour of studying, the final exam score increases by 4.82 points on average