Here's the graph of the function $c(m) = 3.5 + 2.5m$ representing the cost of a taxicab ride as a function of distance from the airport. The red point on the graph at $(8, 23.5)$ indicates the cost for a ride to a hotel 8 miles away from the airport, which is $23.50.

Would you like more details on this topic or have any other questions?

Here are some related questions you might consider:

1. How would the cost function change if the per-mile rate increased?
2. What would the intercept represent in a real-life scenario?
3. How would you calculate the cost for a round trip?
4. Can you find the distance if the total cost is given, say $50?
5. How do variations in flat rates affect the overall cost function?

Tip: When analyzing a linear cost function like this, consider the slope and intercept for insights into variable and fixed costs respectively.