Equations of Lines
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1) Given a slope and one intercept

2) Given intercept and line (parallel)

3) Given line and point (perpendicular)

4) Given two points

5) Given two intercepts

 


We can construct the equation of a line with a numerical of information. All we need is a slope and a point. We will use certain facts about the slope of lines. They are:

1) Parallel lines have the same slope.
2) Perpendicular lines have slopes that are negative reciprocals of one another.