Chapter 5.1

 Lesson Objective: NCSCOS 4.01 – Students will know how to find the slope of a line  Students will know how to find the slope using two points

 We refer to the slope of a line as the lower case letter: m  The equation to find slope is:  In order to find slope, we’re going to need two ordered pairs (points)

 Example 1: Find the slope of the line that passes through (3, 5) and (6, 2)  To solve this problem, we have to label our two points.  It doesn’t matter which point you label x 1 and which one x 2

 Plug the points into the slope equation

 Simplify the top and the bottom  Simplify the fraction

 m = -1, so the slope for these two points is -1

1. (1, 3), (2, 7) 2. (6, 3), (7, -4) 3. (6, -2), (5, -4) 4. (7, -4), (4, 8) 5. (15, 2), (-6, 5) Find the slope for the following points

 Example: Find the slope of the line A.  In order to find slope, you need two points  Find two points on the line  Plug the points into the slope equation (0, -1) (2, 2) A

 Label the points and write the equation (0, -1) (2, 2) (0, -1) x 1, y 1 x 2, y 2

1. Find the slope of Line A 2. Line B 3. Line C 4. Line D D C B A

1. Find the slope: (2, 5), (-4, 2) 2. (-5, 3), (2, 0) 3. (-3, -7), (2, -4) 4. Line A 5. Line B B A