8.EE.C.8.C: Definitions, Key Concepts & Examples

Front

Linear Equation

Back

Equation of a straight line

Front

Two Variables

Back

x and y in equations

Front

Coordinate Points

Back

(x1, y1), (x2, y2)

Front

Intersection

Back

Point where lines meet

Front

Slope Formula

Back

(y2-y1)/(x2-x1)

Front

Parallel Lines

Back

Same slope, no intersection

Front

Perpendicular Lines

Back

Slopes are negative reciprocals

Front

Graphing Method

Back

Plot points, draw line

Front

Substitution Method

Back

Solve one equation, substitute

Front

Elimination Method

Back

Add/subtract to eliminate variable