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Slope of a Line

The slope of a line is the tangent of its angle of inclination with the x-axis.


The slope of a line passing through two points (x1 , y1) and (x2 , y2) is given by

Description: 37230.png 

Slope of a line ax + by + c = 0 is given by Description: 45254.png

Description: 53319.png

Let m1 and m2 be the slopes of two lines, then

  • m1 = m2, if the lines are parallel
  • Description: 37210.png if the lines are perpendicular

Slope of line AB making an angle θ with x-axis is tan θ.

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