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# Algebra 1-Chapter 4

### Algebra 1-Chapter 4 Vocabulary

One of four parts into which the axes divide a coordinate plane: labeled I, II, III and IV. quadrant
An equation whose graph is a line. linear equation
Ax + By = C standard form of a linear equation
y = mx + b slope-intercept form of a linear equation
The ratio of the vertical change (the rise) to the horizontal change (the run) between any two points on a nonvertical line. slope
Two lines in the same plane that do not intersect. parallel
A relationship between two variables, x and y, provided y = ax and "a" does not equal 0. direct variation
In y = ax, the "a" value. constant of variation
The most basic linear funtion in a family of linear equations. parent linear function
A group of functions with similar characteristics. family of functions
Created by: aelohaus