Slope of a Line Segment
How to Use this Applet
The Graph Area
 Drag an endpoint of the segment to move it to any location.
 Drag a point along the segment (other than an endpoint) to move the segment.
 <SHIFT>+drag an endpoint of the segment to move it to any other location equidistant from the other endpoint.
 <CONTROL>+drag an endpoint of the segment to move it to any other location along a line containing the segment.
Other
 The arrow keys will move the "selected" endpoint.
 If the arrow keys don't respond, click the cursor in the applet frame then try again.
 Select THE RISE/RUN RELATION button to see the calculation of pitch (slope) in the absence of a coordinate system.
 Select THE SLOPE FORMULA button to see the calculation of slope as related to locations in a coordinate system.
 Hold down the RUN < 0 button to see the calculation of slope when the denominator of the formula (RUN) is less than zero.
 Select the x_{1}, y_{1}, x_{2} or y_{2} buttons to enter values for coordinates as text.
 Select the SWITCH 1 & 2 button to interchange the coordinates of P( x_{1}, y_{1} ) and Q( x_{2}, y_{2} ).
 Select the PRECISION button to set number rounding.
 Select the MOVE ORIGIN button, then drag in the graph area to move the entire coordinate system.
 Select the CHANGE SCALES button, then drag in the graph area (towards or away from the origin) to expand or compress the scales on each axis.
 Select the ? button for help.
 Select the RESET button to restore the applet to the initial state.
