Slope:

1
Slope
m
Rate of Change
2
The Slope of a horizontal line is _______.
0
Think You can walk on a horizontal floor. (not
up and not down)
The Slope of a vertical line is _________.
undefined
Think You cannot walk up a vertical floor.
3
Indiana ---gt Florida
4
A Closeup of the Sign
5
Near Chattanooga, Tennessee
6
5 Grade means SLOPE !
7
Do you see the guy ? Thats me!
8
in the green white stripe shirt
9
Small Slope or Big Slope ???
10
(No Transcript)
11
A Sign for the Illiterate...
12
Example 3-1a
Find the slope of the line that passes through
(1, 3) and (2, 3). Then graph the line.
13
Example 3-1b
Graph the two ordered pairs and draw the line.
The slope of the line is 2.
Use the slope to check your graph by selecting
any point on the line. Then go up 2 units and
right 1 unit or go down 2 units and left 1 unit.
This point should also be on the line.
14
Example 3-1c
Find the slope of the line that passes through
(2, 3) and (1, 5). Then graph the line.
15
Example 3-2a
Graph the ordered pair (1, 3).
Then, according to the slope, go down 3 units and
right 4 units. Plot the new point at (5, 6).
Draw the line containing the points.
16
Example 3-2b
Graph the line passing through (2, 5) with a
slope of 3.
17
Example 3-3a
Communication Refer to the graph. Find the rate
of change of the number of radio stations on the
air in the United States from 1990 to 1998.
18
Example 3-3b
Answer Between 1990 and 1998, the number of
radio stations on the air in the United States
increased at an average rate of 0.225(1000) or
225 stations per year.
19
Example 3-3c
Computers Refer to the graph. Find the rate of
change of the number of households with computers
in the United States from 1984 to 1998.
Answer The rate of change is 2.9 million
households per year.