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3. 3 Interpret Rates of Change of Quadratic Functions p. 69

3. 3 Interpret Rates of Change of Quadratic Functions p. 69. Vocabulary. rate of change: the speed at which a variable changes over a specific period of time Ex: Cell Phones ( cost per ______) Cars (miles per ______). goal.

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3. 3 Interpret Rates of Change of Quadratic Functions p. 69

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  1. 3.3 Interpret Rates of Change of Quadratic Functionsp. 69

  2. Vocabulary rate of change: the speed at which a variable changes over a specific period of time Ex: Cell Phones ( cost per ______) Cars (miles per ______)

  3. goal Use intervals of increase and decrease to understand average rates of change of quadratic functions.

  4. Ex. 1: Identify Intervals of Increase & Decrease • Graph the function. Identify the intervals over which the graph increases and decreases. a) y = x2 + 3x – 4 b) y = -1/2 (x – 2)2 + 1

  5. Today’s Classwork… • P. 72 #’s 1-7 ALL • #’s 1-4 are the only ones you graph

  6. Guided Practice p. 69 #1, 2, 4, 6 1) 2) 4) 6)

  7. Ex. 2: Calculate an Average Rate of Change Calculate the average rate of change of the function y = -0.5x2 + 4 on the given interval. a) b)

  8. Ex. 2: Calculate an Average Rate of Change Calculate the average rate of change of the function y = -0.5x2 + 4 on the given interval. c)

  9. Guided Practice p. 70 #7

  10. Ex. 3: Compare Average Rates of Change Compare the average rates of change of y = x2 and y = x on .

  11. Guided Practice p. 71 #10

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