Visual aid for teaching linear relationships

Details Visual aid for teaching linear relationships Visual aid for teaching linear relationships

1986-02-10

1987-06-30

Grieb, William H.

Education and demonstration

Mathematics

Geometry, trigonometry, or physical mathematic model structure

G09B 2304

Patent

active

046767541

ABSTRACT:
FIG. 5 shows a background sheet A featuring the axes X and Y. A transparent strip E is pivotally assembled to A at the pivot point O. A transparent flat tube F is slidable on E. A straight line D is drawn on E and F through O. An operating button G is attached to F. A transparent cover sheet H is placed over the assembly. A small gap K is left between A and H by means of the distance pieces L. A slot J in the cover sheet H provides access to G. The axes may be calibrated to represent any entities involved in linear relationships, such as percentages, elements of multiplication, division etc. The gradient of the line D may be varied manually, thereby illustrating varying rate of proportionality.

REFERENCES:
patent: 771663 (1904-10-01), Percy
patent: 3340624 (1967-09-01), Savin et al.
patent: 3414190 (1968-12-01), Lemiesz

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