Question

A dog boarding facility charges daily based on a 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 50lbs 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?(1 point)
Responses

weight; 1
weight; 1

amount; 1
amount; 1

weight; 10
weight; 10

amount; 10
amount; 10

Answer 1

weight; 10

Reason: The x-axis should be the dog's weight. A scale of 10 (lbs) gives clear tick marks at 0,10,20,30,40,50, etc., which shows the important breakpoints (15 and 50) and the linear rise beyond 50.