Warm Up Write the equation of the line with slope = -3 and goes through the point (9, -3) Write the equation of the line through the points (3, -4) and.

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Warm Up Write the equation of the line with slope = -3 and goes through the point (9, -3) Write the equation of the line through the points (3, -4) and (2, -1) 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.

17. 1/5, 1mile in 5 secs. 18. -16, -16 ft per sec. y-7=1(x-5) HW Check 4.5 D 2. 5/3 3. -2 4. -2/3 16. 3, 3pts per basket. 17. 1/5, 1mile in 5 secs. 18. -16, -16 ft per sec. y-7=1(x-5) Y-2= 3(x-1) Y-3=4(x+2)

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=1 14. 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+2 4. y = -8 - 6

Lines of Best Fit

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.

Taylor Laughtner Miley Cyrus

President Obama lady gaga

Kim kardashian nick jonas

Justin bieber jennifer lopez

Ashton kutcher jennifer aniston

Here are the correct ages…. Fill in on your worksheet! Taylor Laughtner 20 Miley Cyrus 20 President Obama 51 Lady Gaga 26 Kim Kardashian 32 Nick Jonas 20 Justin Bieber 18 Jennifer Lopez 43 Ashton Kutcher 34 Jennifer Aniston 43

Steps to creating a line of best fit 1. Plot all ordered pairs to create a scatter plot 2. Find two points that you think would be on the best fit line. 3. Find the slope & y-intercept of that line and write the equation of the line.

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

Scatter Plots and Correlation Scatter plots have 3 types of correlation

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.

Creating a Scatter Plot on your Graphing Calculator Directions: STAT 2. 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.

Creating Scatter Plots

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)

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.

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.

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

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.

Complete the rest of the worksheet

HW 4.7