# 2.4 Lines. Slope Find the slope of the line passing through the given points.

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2.4 Lines

Slope Find the slope of the line passing through the given points.

Slope (+) Slope (-) Slope Zero Slope No Slope

Graphing Linear Equations Graph a line given a point and the slope

General Form X and Y must be on the same side A and B may not contain any fractions A must always be positive

Point slope Find the equation of a line in general form given a point and a slope.

Find the equation of a line in general form given two points. Point slope

Slope – Intercept Find the slope and y-intercept of each equation and graph.

2.5 Parallel and Perpendicular Lines

Parallel Lines Two non-vertical lines are parallel if and only if their slopes are equal and they have different y-intercepts.

Two non-vertical lines are perpendicular if and only if the product of their slopes is – 1. Perpendicular Lines

Determine if the lines are parallel, perpendicular, or neither.

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