How to graph #3 and what's the answer graph wise. i need plz

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !