0.4 Hyperbole tool

Hyperbole; tool to draw y=1/X

Global description
The global shape of the tool is a rectangle hook with the curved contour at the inner side.
Pushpin markers are provided at the top surface.
A small square for alignment is left out at the lower left corner of the tool.
By nature of the formula, the tails of the tool become very thin. To maintain the sturdiness of the tool, additional material has been added.
the graph contour endings contain a pen blocker.

Detailed description
The formula represented in this tool is a smooth curve only going down, seen from
X equals 0 to X equals 8.
Along the curve small indents are provided to indicate Y values corresponding with X values equal 0,25, 0,50, 1, 2, 3, 4, 5, 6, 7 and 8 respectively.