Post on 17-Jan-2016
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 LinesTwo 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.