Directions : Which solution is linear and which solution is nonlinear. For linear solutions you will need to write a function that models it and then write one ordered pair and explain its meaning in the context of the solution.

1.) Alex is biking down a hill. He starts at 2mph. For each second he rides down the hill his speed doubles.

2.) Carlie is getting a book printed. It costs $7 plus $0.50 for each page added.