Featuring a number scale — To explain to a class that the coordinates of every point on the graph satisfy the equation when this obviously is not true due to the crudeness of make-shift, freehand drawn axes, and approximated points is a poor example to set before any student. To the teacher who desires to accomplish better understanding of graphing thru greater accuracy we offer the following charts —
1´´ squares emphasized in 5’s for
easier reading.
Bold X and Y axes.
Large size (20 x 20) coordinates.
Number scale runs from +21 to -21.
Cadmium plated pull-down ring.
Basswood half rounds.
Blank rear side has many uses.