Answer:
y = 45x + 20
Step-by-step explanation:
The general equation you are looking for is y = ax + b. b is the y intercept and a is the slope.
No matter what happens, he charges $20. So far your equation is
y = 20
Now what happens is that for every hour he works, he charges 45 dollars. Call the number of hours = x
y = 45x + 20 Answer
