FINDING THE SLOPES OF LINES

For the javascripted graph below,
NetScape 3.0+ or Internet Explorer 4.0 needed

Recall that the slope of a line passing through points (x1, y1) and (x2, y2) is:

m =  rise run  =  y2 - y1 x2 - x1

For the exercises below, moving your mouse across the graph allows you to control which line is shown. If you slide your mouse off the bottom edge of the graph, the chosen line will remain visible. When you have selected a line, you may test if it has one of the slopes named in 7 problems below.

NetScape 3.0+ or I.E 4.0 needed. Move the mouse arrow slowly across the graph at the left. THE RED LINE WILL MOVE. To save your chosen line, slide your mouse arrow off the bottom edge of this graph.

The red line doesn't move?? Update your browser, please.

[1] Use your mouse to show a red line with slope = -2 ; when you are done,

[2] Use your mouse to show a red line with slope = +2 ; when you are done,

[3] Use your mouse to show a red line with slope = + ½ ; when you are done,

[4] Use your mouse to show a red line with slope = - ½ ; when you are done,

[5] Use your mouse to show a red line with slope = +1 ; when you are done,

[6] Use your mouse to show a red line with slope = - 1 ; when you are done,

[7] Use your mouse to show a red line with slope = 0 ; when you are done,

[8] Use your mouse to show a red line with undefined slope ; when you are done,

Return to Math 141 Home Page

This page copyrighted