A) 4 Calories per minute - what I did was find that in 5 minutes, 20 calories were burned and put that into the fraction 5/20, which simplified is 1/4 (4 calories per 1 minute) B) I believe the slope of the graph is 1/4. For this I took the two points (20,5) and (40,10) and did delta y over delta x which gave me a slope of 1/4