Question 13 of 13 The table below gives the number of calories burned per minute, B = f(w, s), for someone roller-blading, as a function of the person's weight, w, and speed, s. w\s 9 mph 11 mph 13 mph 15 mph 120 lbs 7.1 9.3 11.7 13.3 140 lbs 8.3 10.9 13.7 15.6 160 lbs 9.5 12.4 15.6 17.8 180 lbs 10.7 14.0 17.6 20.0 200 lbs 11.9 15.6 19.5 22.2 (a) Isf positive or negative? Is f, positive or negative? What do your answers tell us about the effect of weight and speed on calories burned per minute? fis positive c f, is positive A heavier person will burn more calories per minute while roller-blading than a lighter person. The number of calories burned per minute while roller-blading goes up as the speed goes up. i (b) Estimate f (160, 11) and f, (160, 11). Interpret your answers. fu (160, 11)= S, (160, 11)= The number of calories by about i if the weight is increased by 1 pound. The number of calories by about i if the speed is increased by 1 mph. SUP