warm up

WARM UP

1) Graph the lines x = -4 and y = 2 on the same coordinate plane & label.

2) Write the equation in point slope form that goes through the point (-5, 3) with a slope of -2.

3) At the football game hotdogs cost $2 and sodas cost $1.50 and you have $12 to spend.

a) Write an equation in standard form. b) What is one combination of hotdogs and

sodas that you could buy with $12?

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 21Miley Cyrus 21President Obama 52Lady Gaga 27Kim Kardashian 33Nick Jonas 21Justin Bieber 19Jennifer Lopez 44Ashton Kutcher 35Jennifer Aniston 44

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)

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 CALCULATORDirections: 1. STAT2. 1:Edit3. enter x in L1, enter y in L24. 2nd Y=5. ENTER6. Turn Scatter Plot 1 ON7. Make sure the type is the 1st dots, Xlist: L1, Ylist: L28. Zoom: 9:ZoomSTAT9. GRAPH

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. STAT3. Using the right arrow key move the heading over to CALC4. Using the down arrow key move down to number

4: LinReg (ax+b)5. ENTER

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:

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 Y1 22 43 64 85 10

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

COMING UP…

HW tonight 4.5B tonight

Benchmark #2 – tomorrow

Quiz Friday!

Unit 4B Test – next Thursday, December 19th