WILL GIVE BRAINLIST TO BEST ANSWER PLUS EXTRA POINTS
5. The cost of a ride in a taxi is $5.00 for the first half-mile plus a constant amount per half mile after that. The sequence below shows the pattern of numbers that appear on the driver's screen.

5.00, 5.75, 6.50, …

Part A: Write an Explicit Function that can be used to determine f(x), the cost in dollars, for a ride in the taxi of, x, half miles.


Part B: What is the cost, in dollars, for an 55-mile ride in the taxi? Provide mathematical justification for your answer.