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Unformatted text preview: x = c slope is undefined, x-intercept is (c,0) Two lines are parallel if they have the same slope and different y-intercepts Two lines are perpendicular if the product of their slopes is -1 (the slope of one is the negative reciprocal of the other) Vertical lines are perpendicular to horizontal lines To find x-intercept : let y=0 and solve for x To find y-intercept : let x=0 and solve for y Or put equation into slope-intercept form Slope m = rise run = 2 1 2 1 y y x x--...
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- Spring '08
- Slope, Elementary mathematics, Line segment, Graph of a function, vertical line