By definition, the rate of change of a line is also called "slope".
When a line passes through the Origin, its equation has the following form:
Where "m" is the slope of the line.
Then, in order to find the slope of the line shown in the graph, you can follow these steps:
1. Choose a point on the line. This can be:
2. Substitute the corresponding coordinates into:
Then:
3. Solve for "m":
Therefore, the answer is: