Proportional Relationships and Slope
Functional Relationships and Tosses
Examine each graph and its corresponding scenario. Think about how the path of the ball in each graph illustrates the scenario.
Next, go to the following page and click the Play button to begin the interactive.To find the slope of a line, just count the rise and the run from one point on the line to another. It doesn’t matter which points on the line you pick. Because the line is straight, you will always pick points that are on the hypotenuses of similar triangles  
The slope of the line is: 

Even counting at a different location, the slope does not change. This is because the two triangles are similar. Now go to the next page and click the Play button to begin the interactive. 