Slopes of Lines

We used the rate of change formula to determine the slopes of lines, including those that are horizontal and vertical. Students were somewhat surprised to learn that dividing by zero is not possible, but needed to know this in order to determine the slope of a vertical line.

Tonight's Homework: Lesson 4.2 ( 44 - 48 and 52 - 55 ) and Lesson 4.4 ( 12 - 18, 20 - 32, FCO, and 33 - 37 )