# Example 1 - Chapter 10 Class 11 Straight Lines

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Example 1 Find the slope of the lines: Passing through the points (3, 2) and ( 1, 4) We know that slope between two points (x1,y1) & (x2,y2) is m = ( 2 1)/( 2 1) Here x1 = 3, y1 = -2, & x2 = -1, y2 = 4 Putting values Slope = (4 ( 2))/( 1 3) = (4 + 2)/( 4) = 6/( 4) = ( 3)/2 Example 1 Find the slope of the lines: (b) Passing through the points (3, 2) and (7, 2), We know that slope between two points (x1,y1) & (x2,y2) is m = ( 2 1)/( 2 1) Here x1 = 3, y1 = -2, & x2 = 7, y2 = -2 Putting values Slope = ( 2 ( 2))/(7 3) = ( 2 + 2)/4 = 0/4 = 0 Example 1 Find the slope of the lines: (c) Passing through the points (3, 2) and (3, 4), We know that slope between two points (x1,y1) & (x2,y2) is m = ( 2 1)/( 2 1) Here x1 = 3, y1 = -2, & x2 = 3, y2 = 4 Putting values Slope = (4 ( 2))/(3 3) = (4 + 2)/0 = 6/0 = (not defined) Example 1 Find the slope of the lines: (d) Making inclination of 60 with the positive direction of x-axis. Slope = m = tan Given = 60 Hence, m = tan = tan 60 = 3

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.