To become a member at a local nature preserve, applicants must pay an initiation fee of $150 plus their yearly membership dues, as shown in the graph. What is the slope of the line joining these points, and what does the slope represent?

Answer:
Step-by-step explanation:
The values at two points that differ by 1 year differ by $125, so the slope is $125 per year.
The graph shows the total cost of membership, which includes the initiation fee (y-intercept) and yearly membership dues (increase per year). The slope represents the increase per year: the yearly membership dues.