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Slope of a line and Parallel and Perpendicular slopes pg. 47. Slope: Slope indicates both how steep the line is and its direction, upward (positive) or downward (negative) from left to right. Horizontal lines have a slope of zero . Vertical lines have an undefined slope .
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Slope of a line and Parallel and Perpendicular slopes pg. 47 • Slope: • Slope indicates both how steep the line is and its direction, upward (positive) or downward (negative) from left to right. • Horizontal lines have a slope of zero. • Vertical lines have an undefined slope. • In y = mx +b, m is used to denote the slope.
Parallel and perpendicular lines • Parallel lines NEVER intersect. • Parallel lines have the SAME SLOPE. • Perpendicular lines intersect at a right angle. • Perpendicular lines have opposite reciprocal slopes. Ex: If one line has a slope of , then any line perpendicular to it has a slope of .