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Warm-Up 12/09

Warm-Up 12/09. Find the slope of the lines between (4,-2) and (-3,7). 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? Write the equation in slope-intercept form: y – 5 = -1/3(x + 12). HW Check 4.5. D

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Warm-Up 12/09

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  1. Warm-Up 12/09 • Find the slope of the lines between (4,-2) and (-3,7). • 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? • Write the equation in slope-intercept form: y – 5 = -1/3(x + 12)

  2. HW Check 4.5 • D 1. m=5/3 2. m= - 2 3. m= - 2/3 16. 3 points per basket 17. 1 mile every second 18. Decreasing by 16 feet every second • y - 7 = 1(x – 5) or y – 8 = 1(x - 6) • y – 3 = -1(x+2) • y – 2 = 3(x – 1) or y – 8 = 3(x – 3) • y – 3 = 4(x + 2)

  3. HW Check 4.6 37. 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 – 5 30. No 31. No 13. x = 1 14. y – 7 = -1/2(x + 6) 15. y + 2 = 2/3(x – 21) 16. y – 5 = 0(x – 7) or y = 5 • y = 1/2x – 11/2 • y = -2x + 11/6 • y = -7/6x + 2 • y = -8x -6

  4. 4B.6 Linear Regression Line of Best Fit

  5. 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.

  6. Taylor LaughtnerMiley Cyrus

  7. President Obama lady gaga

  8. Kim kardashian nick jonas

  9. Justin bieberjenniferlopez

  10. Ashton kutcherjenniferaniston

  11. 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

  12. Steps to creating a line of best fit 1. Create a scatter plot using your calculator. Draw a sketch of this on your paper.

  13. Scatter Plot • A type of graph used to dislpay data of two variables.

  14. 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?

  15. Line of Best Fit: • A straight line that best represents the data on a scatter plot.

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