## At A Glance

### Watch Video on Writing the Equation of a Line

WEBSITE: http://www.teachertube.com Students learn to write the equation of a line in slopeintercept form using a table of ordered pairs. The first step is to determine if the ordered pairs in the table lie on a line so that slopeintercept form or y mx b form can be used to write the equation of the line. If the rate of change is constant then the ordered pairs lie on a line. Next to find the slope of the line remember that the rate of change is equal to the slope. To find the yintercept substitute the slope in for m in the formula y mx b and substitute a given ordered pair in the table for x and y in the formula then solve for b. Finally substitute the values for m and b into the formula y mx b to write the equation of the line.
Length: 02:59

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