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Unformatted text preview: will have an undefined slope and vice versa. Perpendicular lines are lines the intersect at right angles and the product of their slopes are equal to -1. If two lines are represented by equations y, =m, x, +c & y^2 =m^2x^2+c then m, &m^2 represent their slopes, & if the two lines are perpendicular then m^1m^2=1. For example, 3y+2x=4 & 6x-4y=-5 are perpendicular lines....
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- Spring '11