1. Warm Up 1
1) Write the equation of the line with slope = -3 and goes through the point (9, -3)
2) Write the equation of the line through the points (3, -4) and (2, -1)
3) Johnny goes to the fair. It costs $5 to get in the fair and $1.50 per ride. Write the equation to represent the amount of money, M, Johnny can spend at the fair.

2. 17. 1/5, 1mile in 5 secs. 18. -16, -16 ft per sec. y-7=1(x-5)
HW Check 4.5
D /
3. -2/ , 3pts per basket.
17. 1/5, 1mile in 5 secs , -16 ft per sec.
y-7=1(x-5)
Y-3=-1(x+2)

3. HW 4.6 37. y-1 = (4/3)(x-1) 38. y-1 = (-3/2)(x-2)
30. Not linear 31. not linear
13. x= y-7=(-1/2)(x+6)
15. y+2=(2/3)(x-21) 16. y=5
y=1/2x-5/2 2. y= - 2x +11/6
3. Y = -7/6x y =

4. Lines of Best Fit

5. Guess my age!
On the following slides you will see photos of 10 famous people. Guess the celebrities age and write it on your worksheet. At the end you will be given the correct data and will use it all to create a line of best fit.

6. Taylor Laughtner Miley Cyrus

7. President Obama lady gaga

8. Kim kardashian nick jonas

9. Justin bieber jennifer lopez

10. Ashton kutcher jennifer aniston

12. Here are the correct ages…. Fill in on your worksheet!
Taylor Laughtner 21 Miley Cyrus 21 President Obama 52 Lady Gaga 27 Kim Kardashian 33 Nick Jonas 21 Justin Bieber 19 Jennifer Lopez 44 Ashton Kutcher 35 Jennifer Aniston 44

13. Steps to creating a line of best fit
1. Plot all ordered pairs to create a scatter plot Hint: x value = actual age y value = estimated age Coordinate pair (actual age, estimated age)

15. Are graphs that relate two sets of data.
Scatter Plots
Are graphs that relate two sets of data.

16. Scatter Plots and Correlation
Scatter plots have 3 types of correlation

19. Trend Line
Is an equation that shows the correlation of the data in a scatter plot. The line of best fit is the trend line (or equation) that best represents the data.

20. Creating a Scatter Plot on your Graphing Calculator
Directions:
STAT
1:Edit
enter x in L1, enter y in L2
2nd Y=
ENTER
Turn Scatter Plot 1 ON
Make sure the type is the 1st dots, Xlist: L1, Ylist: L2
Zoom: 9:ZoomSTAT
GRAPH
Make Sure to demonstrate the steps on the Calculator once students have written down the steps. Make sure to demonstrate the steps on the calculator on the computer so that students can see the keys you are pressing and the menus that get pulled up on the calculator.

21. Creating Scatter Plots

22. Creating a Trend line/Line of best fit
**USE YOUR GRAPHING CALCULATOR!!!** Directions for creating a Line of Best Fit: 1: Create the scatter plot on your calculator. (You cannot create a line of best fit in your calculator if you have not created your scatter plot)

23. 2. STAT 3. Using the right arrow key move the heading over to CALC 4
2. STAT 3. Using the right arrow key move the heading over to CALC 4. Using the down arrow key move down to number 4: LinReg (ax+b) 5. ENTER
Make sure to demonstrate the steps on the calculator on the computer so that students can see the keys you are pressing and the menus that get pulled up on the calculator.

24. Using your directions: 1. Create the scatter plot for the data
Using your directions: 1. Create the scatter plot for the data. – Determine the type of correlation for this data. 2. Find the line of best fit for the data:
Continue to use the desktop calculator to show the steps for creating a scatter plot and finding the line of best fit. Do this for all examples teacher is doing with the students.

25. Using your directions: 1. Create the scatter plot for the data
Using your directions: 1. Create the scatter plot for the data. – Determine the type of correlation for this data. 2. Find the line of best fit for the data: X Y 1 2 4 3 6 8 5 10

26. 1. Create the scatter plot for the data. 2
1. Create the scatter plot for the data. 2. Determine the correlation for this data 2. Find the line of best fit for the data:
3. Estimate the number of calories in a fast-food meal that has 14g of fat.

27. Complete the rest of the worksheet

33. HW 4.7