2. Flashback 9-28-12 x, y, z and f are all positive integers. x is bigger than y, and z is smaller than y. Which of the following must be true? Anx = y + z Bx + n is larger than z + n Cny is the average of x and z Dy + n is smaller than x + z Ex + y = 2n – z

3. Joke of the day Where did Christopher Complementary begin his journey?

4. At the Verta Seas.

5. A few definitions Mathematical model- way to approximate data so that future data can be predicted. Numerical Model- Uses raw data and analyzes it to look for trends. Algebraic Model- Uses formulas to approximate data and to predict future values. Graphical Model- Visible representation of numerical and algebraic models.

6. The Minimum Hourly Wage YearMinimum Hourly WagePurchasing Power in ‘96 Dollars 19550.754.39 19601.005.30 19651.256.23 19701.606.47 19752.106.12 19803.105.90 19853.354.88 19903.804.56 19954.254.38 20005.154.69 20055.154.15

7. US Prison Population YearTotalMaleFemale 198031630412 198548045921 199074060941 19951085102164 20001382129092

8. Female percentage of US Prison Population Year% Female 19803.8 19854.4 19905.5 19955.9 20006.7

9. Algebraic model Which is a better deal if pizzas are the same price: rectangular 18” x 24” or round 24”? Model: Area! A= l x w and A=∏r^2

10. Fitting a Curve to data PercentageOf FemalesIn thePrisonPopulationIn years after 1980 T05101520 f3.84.45.55.96.7 Use linreg on calculator to find line that fits data.

11. HW: p. 81 Ex. 1-10

12. Exit Slip p. 82 #11, 13, 15, 19, 21, 23