IN MATH: an equation of the form ax + by + c = 0 where a, b, and c are integers if at all possible.
See: 
Slope in Sound & Picture

A Graph is A Portrait  an essay on the concepts of graph

GRAPHITI  introductory coordinate geometry, point generation, distance, functions

PointPlotting Animation  see stepbystep how to create a graph

 Algebra Notes

Three Most Important Functions

Lines

vertical lines, x = a, a = some constant

horizontal lines, y = a, a = some constant

linear functions, y = ax + b, etc.

Equations of Lines, y  y_{1} =m (x  x_{1}), etc.

 Function and Relation Library  Many functions w/their features & graphs

Graphing Vocabulary

Function Vocabulary

IN ENGLISH:1. as defined above.
APPLICATION: See list
10.
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