Numerical : Find the slope of the line passing through the points ( 3 , – 2 ) and (– 1 , 4 ),
Solution : The slope of the line through ( 3 , – 2 ) and (– 1 , 4 ) is denoted by m = tan θ = ( y2-y1 )/( x2-x1 ) = ( 4- ( -2 ))/ ( -1 -3 ) = -6 / 4 = -3 / 2
Angle between two Lines
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Numerical : If angle between two lines is π / 4 and slope of one of the lines is ½ , find slope of other line .