given the points P(7, 4) and Q(-3,2), find each of the following: (a) The slope of the line containing P and Q (b) The length of the segment PQ (c) The midpoint of the segment PQ For each equation, find the intercepts. (a) x2 = y 13. Find the value of b so that the point (b, 5) is on the graph of the equation y = x2 + 4x. 14. The annual cost of operating a brand new car is $500, and this cost increase by $80 for each additional 1000 miles on the car. (a) Construct a linear equation that describes the relationship between