1) Ellen must decide between two cameras. The first camera costs $47.00 and uses two alkaline AA batteries. The second camera costs $59.00 and uses one $4.95 lithium battery. She plans
to use the camera frequently enough that she probably would replace the AA batteries six times
a year for a total cost of $11.50 per year. The lithium battery, however, will last an entire year.
a. Let x represent the number of years, and let y represent the cost in dollars. Write an
equation to represent the overall expense for each camera.