WARM-UP 12/091. Find the slope of the lines between (4,-2)
and (-3,7).
2. Mary wants to go to the amusement park. It costs $4 to get in, and $0.90 a ride. If Mary has only $20, how many rides can she ride?
3. Write the equation in slope-intercept form:y – 5 = -1/3(x + 12)
HW CHECK 4.51. D
1. m=5/32. m= - 23. m= - 2/3
16. 3 points per basket17. 1 mile every second18. Decreasing by 16 feet every second
2. y - 7 = 1(x – 5) or y – 8 = 1(x - 6)3. y – 3 = -1(x+2) 4. y – 2 = 3(x – 1) or y – 8 = 3(x – 3)5. y – 3 = 4(x + 2)
HW CHECK 4.637. y – 1 = 4/3(x – 1) or y + 3 = 4/3(x + 2)38. y – 2 = -3/2(x – 1) or y +1 = -3/2(x – 3)39. y – 1 = 2/5(x – 1) or y – 6 = 2/5(x – 1)29. yes, y = 4x – 530. No31. No 13. x = 114. y – 7 = -1/2(x + 6)15. y + 2 = 2/3(x – 21)16. y – 5 = 0(x – 7) or y = 51. y = 1/2x – 11/22. y = -2x + 11/63. y = -7/6x + 24. y = -8x -6
4B.6 LINEAR REGRESSION
Line of Best Fit
GUESS MY AGE!On the following slides you will see photos of
20 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 20Miley Cyrus 20President Obama 51Lady Gaga 26Kim Kardashian 32Nick Jonas 20Justin Bieber 18Jennifer Lopez 43Ashton Kutcher 34Jennifer Aniston 43
STEPS TO CREATING A LINE OF BEST FIT1. Create a scatter plot using
your calculator. Draw a sketch of this on your paper.
SCATTER PLOT A type of graph used to dislpay data of two
variables.
Back to Spaghetti Lab: 3. Is every graph in the class the same?
4. What is the “best” line through this data? Think about if you were the PERFECT guesser. What would that line look like?
5. According to the line of best fit and the scatter plot, did you overestimate or underestimate the ages?
LINE OF BEST FIT: A straight line that best represents the data
on a scatter plot.
