Answer :
B because Q is how much he found and a quarter is 0.25 so it’s q0.25 and you add that to 2.25 that’s how much he had in his pocket
He found q quarters so q is variable here .
So it contains the slope
- 0.25q
Starting value is fixed i.e 2.25$
The expression is
- 2.25+$0.25q