A dog boarding facility charges daily based on the dog's weight. If the dog weighs under 15 lbs, the rate is $30. If the dog is between 15 and 50 lbs, it is $35. If the dog is 50 lbs or more, the charge is #35 plus $3 for each additional 5 lbs over 50 lbs. Which of the following BEST defines the quantity and scale for the x-axis for a piecewise linear graph of the fee structure?

Question

A. amount; 1
B. weight; 1
C. amount; 10
D. weight; 10

Answer 1

The quantity on the x-axis should represent the weight of the dog. Therefore, the best option is D. weight; 10. This reflects the increment of 10 lbs for each section of the fee structure.