Lesson#10 <br />How to write equation of straight line? (1) <br />Q. How to write the equation of straight line? <br />To write equation of a straight line we need some information about the line, like: <br />* Either the line is horizontal or vertical or slant in simple words slope of line. <br />* One or two points of line. <br />* Intercepts of line. <br />* Distance of line from origin. <br />To write equation we don't need all of the above information, We only use some combinations of this information. <br />Q. How to write the equation of a horizontal line? <br />If it is given that the line is <br />Horizontal <br />or <br />Parallel to x-axis <br />or <br />perpendicular to y-axis <br />or <br />Slope of line = 0 <br />then equation will be <br />y = c <br />What are intercepts of line? <br />X-Intercepts: <br />If a line intersects x-axis at (a , 0) , then "a" is called x-intercept of the line. <br />Y-Intercept: <br />If a line intersects y-axis at (0 , b) , then "b" is called y-intercept of the line. <br />Introduction to Analytical Geometry <br />Chapter No 4 <br />Exercise No 4.3 <br />Mathematics <br />part 2
