I am having trouble solving these questions,

Question 2 20 pts Which of the following is the correct equation of the line if the value of the slope is equal to -4 and the value of the y-intercept is equal to -3? Question 3 10 pts The regression equation 3! = 78.2 + 3.25x is used to predict the high temperature for a town that is x miles from the coastline. If a particular town is located at the coastline, what would its predicted high temperature be? ' Question 4 30 pts The regression equation 5} = -396.2 + 2.34 x is used to predict the amount of prot made when selling x units of the product. In order to not have a predicted loss, at least how many units must be sold? ' Question 5 20 pts The regression equation j? = 50+4.77x is used to predict the number of points a student is expected to earn on a particular nal exam when he or she studies x hours each night before taking it. How many points are you expected to make if you have to take this nal exam and you studied 9 hours each night before taking it? Round your answer to the nearest tenth of a point