Question

To become a member at a local nature preserve, applicants must pay an initiation fee of $100 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 1

The points are (2,150), (4,200).

The slope of the line joining the points is,

$\begin{gathered} m=\frac{200-150}{4-2} \\ =25 \end{gathered}$

Thus, the slope represents the increse in cost per year of membership.