# record 1: header: parent, keywords
# record 2: calling parameters
# record 3: submit buttons
# record 4: html form content

:geometry, analytic geometry
line, line equation, equation of line, line through 2 points,
equation of line through 2 points

:precision, 12
operation, line through 2 points
size, 600x480
picturesize,320x240
option, implicit explicit parametric plot

:, Find the equation

:<TD style="text-align:center;">
 $submit1
 of the line through two points
 <INPUT TYPE=TEXT SIZE=40 NAME="formula" VALUE="(5,-1), (-4,3)">
