To earn money for college, Avery works two part-time jobs: A and B. She earns 20 per hour working at job B. In one week, Avery earned a total of dollars for working at the two part-time jobs. The graph above represents all possible combinations of numbers of hours Avery could have worked at the two jobs to earn dollars. The x-axis represents hours worked at Job A, and the y-axis represents hours worked at Job B. The line segment connects the points and . Which of the following best describes the meaning of the slope of the line segment?
The total amount of money Avery earned.
The ratio of hours worked at Job B to hours worked at Job A.
The number of hours Avery must decrease at Job B for every hour increase at Job A to maintain the same total earnings.
The difference in hourly rates between Job A and Job B.
