According to the 1993 World Almanac, the number of calories a person walking at 3 mph burns per minute depends on the persons weight as in the following table
Weight (pounds) 100 120 150 170 200 220
Walking (cal) 2.7 3.2 4.0 4.6 5.4 5.9
(a) On a sheet of paper, graph the linear function for the calories used per minute whle walking, as a function of weight, w. Find an approximate formula for this equation.
(b) Domain and range?
The main problem i have is the formula and range. Help please and thank you!