The price of an adult one-day ticket to Walt Disney World was $46 in 2000, and it increased by about $3.75 per year until 2012. Let p be the price (in dollars) of a ticket at t years since 2000.
a. Find an equation of a linear model to describe the situation.
b. Solve the equation you found in part (a) for t.
c. Use the equation you found in part (b) to estimate in which years the prices of tickets were $70, $75, $80, $85, and $90.