Bernadette throws the javelin for her school's track and field team. The graph below shows the height and...

Bernadette throws the javelin for her school's track and field team. The graph below shows the height and horizontal distance traveled by the javelin for three of Bernadette's practice throws.
Javelin Throws
Height (feet)
Distance (yards)
Throw #1
Throw #2
Throw #3
Use the graph to determine the average rate of change over the interval [0, 20] for Throw #2. To earn full credit, show your work using a method explained in the Orientation.