Final answer:
The function representing Joseph's taxi charges, which includes a $10.00 initial service fee plus $0.75 per mile, is a linear function. This is due to its constant rate of change and its representation as a straight line on a graph with the equation C = 10 + 0.75m.
Step-by-step explanation:
Type of Function Represented by Joseph's Taxi Charges
Joseph's taxi charges $10.00 for the initial service and then $0.75 per mile driven. The cost of the taxi service (let's call it C) can be represented by the equation C = 10 + 0.75m, where m is the number of miles driven. This equation is a linear function because the amount charged increases by a constant amount ($0.75) for each additional mile.
Justification
A linear function has the form y = mx + b, where m is the slope and b is the y-intercept. In Joseph's taxi charge formula, 0.75 is the slope, representing the rate per mile, and 10 is the y-intercept, representing the initial charge. This function is linear because it has a constant rate of change and graphs as a straight line.