Lecture-6

Straight Lines Lecture 6
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DERIVATIONS OF FORMULAS TO FIND EQUATION OF STRAIGHT LINES

Two-point form

NCERT EXERCISE 10.2

Question 7. Passing through the points (–1, 1) and (2, – 4).

Slope intercept form and meaning of intercept

Question 5. (using Slope intercept form) Intersecting the x-axis at a distance of 3 units to the left of origin with slope –2.

Question 6. (using Slope intercept form) Intersecting the y-axis at a distance of 2 units above the origin and making an angle of 30 with positive direction of the x-axis.

Intercept form

Normal Form of Straight Line

Question 8. (using Normal Form) Perpendicular distance from the origin is 5 units and the angle made by the perpendicular with the positive x-axis is 30.