This video covers how to write the equation of a line if you know two points on the line, providing two methods for doing so. The first method is to graph the two points and carefully draw the line, then determine the slope and y-intercept. The second method is to use the formula for slope to determine the slope of the line and then use the slope point formula or plug in an ordered pair, x and y, and the slope to solve for b. The video provides examples of both methods and emphasizes the importance of checking that the equation works for both given points.
Covers how to write the equation of a line if you know two points on the line. This is part 21 of a series of videos about graphing lines.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com