2.4 AVERAGE RATE OF CHANGE

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2.4 AVERAGE RATE OF CHANGE

• Formula for average rate of change as it applies
  to a graph
• avg. rate change of y values
• 15. of change change of x values
• (4,5)
• (1,3)

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2.4 AVERAGE RATE OF CHANGE

• Formula for average rate of change as it applies
  to a graph
• avg. rate change of y values
• 15. of change change of x values
• (5,2)
• (0,6)

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2.4 AVERAGE RATE OF CHANGE

• 19. The table gives the population in a small
  coastal community for the period 1990 1999.
  Figures shown are for January 1 in each year.
• What was the average
• rate of change of population
• between 1991 and 1994?
• b) What was the average rate of
• change of population between
• 1995 and 1997?
• c) For what period of time was
• the population increasing?
• d) For what period of time was
• the population decreasing?

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2.4 AVERAGE RATE OF CHANGE

• 21. The table shows the number of CD players
  sold in a small electronics store in the years
  1989 1999.
• What was the average
• rate of change of sales
• between 1989 and 1999?
• b) What was the average rate of
• change of sales between
• 1989 and 1990?
• What was the average rate
• of change of sales between
• 1990 and 1992?
• Between which two successive
• Years did CD player sales increase
• Most quickly? Decrease most
• Quickly?

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2.4 notes cont

• The graph of a function is given. Determine the
  intervals on which the function is increasing and
  on which it is decreasing.
• 23. (1,3)
• (-1,2)
  (4,2)
• (2,-1)
  
  
  

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2.4 notes cont

• The graph of a function is given. Determine the
  intervals on which the function is increasing and
  on which it is decreasing.
• 25.
• (1,2)
• (3,1)
• (-2,0) (1,-2) (3,-1)
  

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2.4 notes cont

• A function f is given.
• Use a graphing device to draw the graph of f
• State approximately the intervals on which f is
  increasing and on which f is decreasing.
• f(x) x2/5
• 33. f(x) x3 2x2 - x - 2