1. What is the meaning of this sign?
Icy Road Ahead
Steep Road Ahead
Curvy Road Ahead
Trucks Entering Highway Ahead

2. 7% is the steepness of the road.
What does the 7% mean? 7%
7% is the steepness of the road. 7%
So, what is slope???
Slope is the steepness of a line.

3. Slope can be defined as the steepness of a line or the rate of change.
We express slope as:

4. A line has a positive slope if it is going uphill from left to right.

5. A line has a negative slope if it is
going downhill from left to right.

6. 1) Determine the slope of the line.
When given the graph, we will apply “rise over run”.

7. Determine the slope of the line.
Start with the lower point and count how much you rise and run to get to the other point!
rise 3 = =
run 6 6 3
Notice the slope is positive AND the line increases!

8. Determine the slope of the line.-1
Find points on the graph.
Use two of them and apply rise over run. 2
The line is decreasing (slope is negative).

9. What is the slope of a horizontal line?
The line doesn’t rise!
All horizontal lines have a slope of 0.

10. What is the slope of a vertical line?
The line doesn’t run!
All vertical lines have an undefined slope.

11. the slope using the formula
If given 2 points on
a line, you may find
the slope using the formula
m =

12. Find the slope of the line through the points (3,7) and (5, 19).

13. Find the slope of the line through the points (3, 4) and (-6, -2)

14. Find the slope of the line through the points (-3,5) and (-4,-1)