Question 431969
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Hi
Find the average rate of change for the function between the given values. 
f(x) = -3x + 9; from 1 to 3  
  slope m = -3, that is: 
as f(x) increases/decreases by 3, x increases/decreases by 1 in opposite direction
given values of x 1,2,3 ..average rate of change for f(x) is -3.