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Example: How do we find slope? Points J(6, 9), K(4, 6), and L(0, 8), M(3, 6) Two Methods: Picture: YA 10 9 8 7 6 5 4 3 2 + -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10 -+ -21 -3 -4 -5 -6 -8 -9 -10 Determine if JK and LM are parallel, perpendicular, or neither. What do you notice about the slopes and the picture? Formula:

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Example How do we find slope Points J6 9 K4 6 and L0 8 M3 6 Two Methods Picture YA 10 9 8 7 6 5 4 3 2 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 21 3 4 5 6 8 9 1 class=

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