Question

Malena is in a book club. The graph shows a proportional relationship between the number of the books Malena has read and the number of the years she has been in the club.

Answer 1

Given:

There are given the graph to find the slope:

Step-by-step explanation:

To find the slope, we need to select two intersecting points.

So,

The two points are:

`(2,30),(4,60)`

Now,

From the formula to find the slope:

`m=(y_2-y_1)/(x_2-x_1)`

Then,

`\begin{gathered} m=(y_(2)-y_(1))/(x_(2)-x_(1)) \\ m=(60-30)/(4-2) \\ m=(30)/(2) \\ m=15 \end{gathered}`

So,

The slope of the given line is 15.

Final answer:

Hence, the correct option is D.