Teachpacks for How to Design Programs

# Graphing Functions

### graphing.ss

The teachpack `graphing.ss` provides two operations for graphing functions in the regular (north-east) quadrant of the Cartesian plane (between 0 and 10 in both directions): graphics functions:
- `graph-fun` : (number -> number) symbol -> true;
  draws a function in bulletized form with a given color
- `graph-line` : (number -> number) symbol -> true (no arguments);
  draws a straight-line function with a given color
For legal color symbols, see the documentation for the draw.ss teachpack.