To move the red line you may click on and move Points A and B. Stop each point at an intersection point on the grid. Slope is the ratio of the vertical change to the horizontal change between two points.
Athena Matherly, November 7, 2006, Created with GeoGebra Updated by S.H. Lapinski
Please direct questions and comments to HCPS Mathematics Specialist Henrico County Public Schools, 2009