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Population Growth - Quadratic or Exponential ?

Population Growth - Quadratic or Exponential ?. What will the population be in 3000?. Collect Data. 1. Go to internet Try www.census. popclock or www.census.gov/population 2. Pick a State 3. Find Population for years 1900-2000 Let x=0=1900, x=1=1910. Plotting Manually.

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Population Growth - Quadratic or Exponential ?

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  1. Population Growth - Quadratic or Exponential ? What will the population be in 3000?

  2. Collect Data 1. Go to internet Try www.census. popclock or www.census.gov/population 2. Pick a State 3. Find Population for years 1900-2000 Let x=0=1900, x=1=1910

  3. Plotting Manually 1. Graph all ordered pairs. 2. X-values represent the years. 3. Y-values represent the population. 4. Connect the curve with a smooth, continuous motion.

  4. Plotting Using the TI-83 Key Strokes 1. List 1 & 2 2. Stat Plot 3. Zoom Stat 5. Stat 6. Quit 7. Calc 8. Regression 9. Y1 10. Vars 5 11. EQ 12. Reg EQ

  5. What Happened? 1. A Quadratic Regression ? 2. An Exponential Regression?

  6. Lineof Best Fit Really, there’s not much difference. Can both answers be correct? Oh, me, oh my - no wonder math is hard!

  7. Predictions According to these models, what might the population be in 3000? 1. Try putting ____ in for x in both equations? 2. Why that number? 3. What could effect this model?

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