1. Unit 5 Lesson 1 Objective:
find the slope of a line given
a graph.

2. What comes to mind when you hear the word slope?

3. Why do you need signs like this one?

4. Slope can be expressed different ways:

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

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

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

8. Remember the word “VUXHOY”
Vertical lines
Undefined slope
X = number; This is the equation of the line.
Horizontal lines
O - zero is the slope
Y = number; This is the equation of the line.

9. Which lines have a positive slope? Which have a negative slope?
What is the slope of line a?
What is the slope of line c?