2.2.1 Tutorial
Slope= Rise/Run
Given:
(3, 3) find the slope, you could do this no problem, 3/3=1, so the slope of
line (3,3) is 1
Now
finding the slope for 2 different points isn’t much harder, the formula is Y2-Y1/ X2-X1
A positive slope is any line
that has points in both quadrants 1 AND 3
2 1 2 1
3 4
3 4
While a negative slope is any
line that has points in both quadrants 2 AND 4
2 1 2 1
3 4 3 4
Parallel lines always have the SAME slope, m1=m2
Perpendicular lines always have negative reciprocals of each other: m1/1 perpendicular to -1/m2, when you multiply the slopes of any perpendicular lines together the product is always -1.
Vertical slopes are always undefined because of Y2-Y1/
X2-X1, and x-x=0 for a vertical line, and nothing can be divided
by “0”, so therefore it is undefined.
The slope for horizontal lines are always 0 because Y2-Y1/ X2-X1,
and y-y=0 no matter what for any horizontal line, and 0 divided by anything is
always 0.
Find the slope: Tell
if +, -, vertical, or horizontal”
1)
2)
3) 
4)
5)
6)
Perpendicular yes or no: Parallel or not?
7)
8)
9)
10)
Find the slope:
11)
12)
13)
14)
15)