Answer:
linear; 70 minutes
Step-by-step explanation:
No graphs are attached to your question here, so we cannot identify the graph for you. It will be one with time on the vertical axis and distance on the horizontal axis. The time scale will show it takes Lucy 20 more minutes for each additional mile she walks. The shape of the graph will be a straight line through the origin.
(20 min/mi) × (3.5 mi) = (20×3.5) min = 70 min
It will take Lucy 70 minutes to cover 3.5 miles at her 20 min/mile pace.
