Slope is the rate of change of a line. 4 types: Positive Negative Zero Undefined

“Slope Dude Video” http://www.youtube.com/watch?v=avS6C6_kvXM

To Find Slope: Draw the graph Count the change in y (rise) Always start with the ordered pair on the left If you go up your slope is + If you go down your slope is Count the change in x (run) Put rise/run

“slope” 3

Graph the line containing the points (-4,2) and (2,-3) and find the slope. 6

Graph the line containing the points (-4,2) and (2,-3) and find the slope. “m” 6

Slope Formula

Find the slope of the line containing (1,1) and (3,5)

Find the slope of the line containing (2,2) and (8,9) 2-9 = -7 = 7 2-8 -6 6

Find the slope of the line containing (-4,-6) and (3,-2) M= -6 - -2 = -6 +2 = -4 = 4 -4 – 3 -4-3 -7 7

Horizontal line = “0” slope What is the slope? (-6,4) (5,4) Horizontal line = “0” slope

Vertical line = “no slope” What is the slope? (3,8) (3,-2) Vertical line = “no slope”

Assignment Page 321 2-28 even exclude #20