Note: Graphs from the Incline task were used to illustrate the scoring criteria for graphs in the friction task. For Friction the horizontal axis should be labeled "Surface Texture (Board)" and the levels should be "Plain," "Felt," and "Sandpaper" (in that order). The vertical axis is the same, but the values should be 8, 12, and 17 (in that order).

Example 3

The following graph would receive a score of 4 points.

Point for...	Points Received
Horizontal Axis:	1
Vertical Axis:	1 (clearly equal interval)
Plotting all the points:	1 while 90 degree lines in the graph, there is a clear line graph
Plotting the points correctly:	1
Total Points	4