Rotations that are positive move in which direction

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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?