The graph shows the price charged by a company to make international phone calls from the united states. Based on the graph what does the slope of the line represent? A-Each call costs 3 cents per minute.
B-Each call costs 5 cents per minute.
C-Each call costs 15 cents per minute.
D-Each call costs 20 cents per minute.

Your vet has placed your pet on a diet. the diet is to contain at least 12 mg of fat and at least 14 mg of protein per serving. these requirements are to be obtained from two food sources. source a contains 2 mg of fat and 2 mg of protein per serving. source b contains 1 mg of fat and 3 mg of protein per serving. if source a sells for $1.28 per serving and source b sells for $1.12 per serving, how many servings of each type should be purchased to satisfy the requirements at minimal cost?