Please help me find the area of the composite figure :)

What is the quadric regression equation that fits these data

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?