3: Silas invests $3,500 at 4% annual interest.
a) Write a function that gives the amount of money Silas has, y, after x years.
b) Write a function that gives the number of years, y, until Silas has x dollars.
c) For each function, make a table displaying the first five years of Silas'
investment, and graph your functions. Explain how each of these representations
shows that the functions you wrote in a) and b) are inverses.
d) For a function f(x), the inverse of the function is sometimes denoted as f¹(x).
Use this notation to write the two functions from a) and b).