where for our example is x1=-7 y1=9, x2=8 and y2=3 (think of ). You can choose the points the other way around but be consistent with the x and y coordinates. You will get the same result.
Step 2. Substituting the above values in the slope equation gives
Step 3. The slope m is calculated as .
I hope the above steps were helpful.
For FREE Step-By-Step videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.