See explanation below
Step-by-step explanation:
Let y = vertical axis
x = horizontal axis
The first graph: Amount owed ($) versus the number of weeks
when y = $100, x = 0
This means when the number of weeks was zero, the amount owed was $100
Hence before the week started counting, the amount owed was $100.
when x = 10, y = 0
This means when the number of week was 10, the amount owed was zero. Hence on the 10th week, no money was owed.
The second graph: Elevator ride versus time (seconds)
when y = 20, x = 0
This implies that the elevator was at the 20th floor when the time was zero seconds
when x = 20seconds, y = 0
This implies at 20 seconds, the elevator was at ground level(zero).