W ARM U P 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.

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W ARM U P 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?

L INES OF B EST F IT

G UESS 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.

T AYLOR L AUGHTNER M ILEY C YRUS

P RESIDENT O BAMA LADY GAGA

K IM KARDASHIAN NICK JONAS

J USTIN BIEBER JENNIFER LOPEZ

A SHTON KUTCHER JENNIFER ANISTON

H ERE ARE THE CORRECT AGES …. F ILL 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

S TEPS 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)

S CATTER P LOTS Are graphs that relate two sets of data.

S CATTER P LOTS AND C ORRELATION Scatter plots have 3 types of correlation

T REND L INE 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.

C REATING A S CATTER P LOT ON YOUR G RAPHING C ALCULATOR Directions: 1. STAT 2. 1:Edit 3. enter x in L1, enter y in L nd Y= 5. ENTER 6. Turn Scatter Plot 1 ON 7. Make sure the type is the 1 st dots, Xlist: L1, Ylist: L2 8. Zoom: 9:ZoomSTAT 9. GRAPH

C REATING S CATTER P LOTS

C REATING A T REND LINE /L INE 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. Using the down arrow key move down to number 4: LinReg (ax+b) 5. ENTER

U SING YOUR DIRECTIONS : 1. C REATE THE SCATTER PLOT FOR THE DATA. – D ETERMINE THE TYPE OF CORRELATION FOR THIS DATA. 2. F IND THE LINE OF BEST FIT FOR THE DATA :

XY

1. C REATE THE SCATTER PLOT FOR THE DATA. 2. D ETERMINE THE CORRELATION FOR THIS DATA 2. F IND THE LINE OF BEST FIT FOR THE DATA : 3. Estimate the number of calories in a fast-food meal that has 14g of fat.

C OMPLETE THE REST OF THE WORKSHEET

C OMING UP … HW tonight 4.5B tonight Benchmark #2 – tomorrow Quiz Friday! Unit 4B Test – next Thursday, December 19 th