2.  The
slope of a line is a ratio of the
change in y (rise) to the change in x
(run) between any two points.

3.  Also
called “rate of change”
 Describes
steepness/slant of a line.
◦ Bigger slope means steeper line!

5.  Choose
any two points:
 Count the change in y (rise)
 Count the change in x (run)
 Divide and reduce.

6.  Find
the slope of the line.

7.  Find
the slope of the line.

8.  Find
the slope of the line.

9.  Find
the slope of the line.

10.  Find
the slope of the line.

11.  Remember:
 When
given two points (x, y) and (x, y)
 To find:
◦ Change in y: subtract y values
◦ Change in x: subtract x values
(in the same order you did the y’s!!)

12.  Find
the slope of the line through the
given points:
 (-3, -1) and (3, 4)
 (-1,
1) and (1, -2)

13.  Find
the slope of the line through the
given points:
 (-4, -1) and (2, 1)

14.  (1,
-2) and (7, -2)
 (-3,
-3) and (-3, -5)

15.  (-1,
 (4,
5) and (6, 5)
6) and (4, 2)

16.  Remember:
Example:
The points in the table lie on a line.
Find the slope.
x
y
1
8
4
6
7
4
10
2

17. The points in the table lie on a line.
Find the slope.
x
y
1
2
3
5
5
8
7
11

18. The points in the table lie on a line.
Find the slope.
x
y
-3
6
-2
4
-1
2
0
0