1. Algebra 3 Lesson 1.1 Objectives: SSBAT define slope. SSBAT calculate slope given 2 points. SSBAT determine the slope of a line from the graph. SSBAT determine if a line increases/decreases by analyzing the slope. Standards: M11.A.1.1.3 and M11.D.3.2.3

3. Slope of a Line  Denoted as m  Measures how steep the line is - the greater the slope the steeper the line  Rate of Change  Ratio of Vertical Change over Horizontal Change

4. Positive Slope The line will be going UPHILL from left to right. Negative Slope The line will be going DOWNHILL from left to right.

6. Finding Slope of a Line from the graph m =

8. Examples: Find the slope of the given line. 1.

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11. (x 1, y 1 ) and (x 2, y 2 ) are points on a line Finding Slope given 2 points on the line.  Reduce the fraction in the end if you can

12. 1.Find the slope of the line containing the points  Does the line go uphill or downhill from left to right?

13. 2. Find the slope of the line containing the points  Does the line go uphill or downhill from left to right?

14. 3. Find the slope of the line containing the points Is the line a Horizontal or Vertical Line?

15. 4. Find the slope of the line containing the points Is the line a Horizontal or Vertical Line?

16. Give an example of two points that would create a line to be undefined.

18. Homework Worksheet 1.1