W ARM U P 1) Graph the lines x = -4 and y = 2 on the same coordinate plane & label. 2) At the football game hotdogs cost $2 and sodas cost $1.50 and you.

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W ARM U P 1) Graph the lines x = -4 and y = 2 on the same coordinate plane & label. 2) 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. Label your variables. 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 20 President Obama 52 Lady Gaga 27 Kim Kardashian 33 Nick Jonas 21 Justin Bieber 19 Jennifer Lopez 44 Ashton Kutcher 35 Jennifer Aniston 44

Use your data to answer questions 1 – 11 on your worksheet.

S TEPS 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.

S O WHO HAS THE REAL " LINE - OF - BEST - FIT "? Based on your guesses for the celebrities ages and your choice of two points, everyone probably has a different equation for the line of best fit. Your answer will be considered CORRECT, as long as your calculations are correct for the two points that you chose. So, if each answer may be slightly different, which answer is the REAL "line-of-best-fit? To answer this question, we need the assistance of a graphing calculator.

C OMING UP … HW tonight 4.10 Possible Quiz 4.2 early next week Unit 4 Test – next Friday 11/1