1. 4.1 A formula for slope Learning Targets learn how to calculate the slope of a line given two points on the line ● determine whether a point lies on the same line as two given points ● find a point on a line given a known point on the line and the slope

2. Warm Up Hector recently signed up with a limited usage internet provider. There is a flat monthly charge and an hourly rate for the number of hours he is connected during the month. The table shows the amount of time he spent using the internet for the first three months and the total fee he was charged. A. Graph the situation B. based on the graph Find the slope

3. Slope formula

4. Find the slope of the graph

5. 1. Consider the line through the points (1,7) and (6,4). Find the slope of the line

6. 2. Consider The line through (-2,3) and (4,-1) Find the slope of the line

7. 3. Given the slope is (1,7) (6,4) A. Without graphing, verify that the point (4,5.2) is also on that line B. find the coordinates of another point on the same line.

8. 4.

9. Homework Pg 220 #1,2,3,6,7,8

10. 4.1 Day 2 Warm Up Write the equation of the line given the two points. Then find a third point that the line would go through. A. (12, -8) and (-20, 0) B. (5, 9) and (1, -3)

11. Horizontal Slopes

12. Vertical Slope

13. 1. Find the Slope of the Table Below

14. 2. Find the Slope of the Table Below

15. 5. Given one point on a line and the slope of the line name two other points on the line. Then check your work a. (3,2) slope 2/5 B. (5,3) slope 0 C. (-4,2) slope -2 D. (-1,2) slope -1.25

16. Exit Slip

17. Group work if extra time

18. Homework Pg 220 #5,8,9,10,11 a,b