Question

A musical band graphed their performance fees. How much does the band charge to perform for 3 hours and 15 minutes?
The band charges $
to perform for 3 hours and 15 minutes.

Answer 1

I don't see the graph — could you either upload it or give two points from the line (times and corresponding fees)? For example, tell me something like "1 hour costs $30 and 4 hours costs $110."

How to compute once you have the graph data:
1. Convert 3 hours 15 minutes to hours: 3 + 15/60 = 3.25 hours.
2. From two points on the graph (t1, C1) and (t2, C2) compute the rate (slope)
m = (C2 − C1) / (t2 − t1).
3. Find the intercept b using b = C1 − m·t1.
4. Then charge for 3.25 hours is C = m·3.25 + b.

Give me two points from the graph and I will compute the exact dollar amount.