1.   Determine the type of polynomial function that could be used to represent the data in the following scatter plot.
   
    A. linear B. quartic
    C. cubic D. quadratic
    Hint

  2.   How many direction changes are there in the graph of a linear equation?
    A. 0 B. 3
    C. 1 D. 2
    Hint

  3.   How many direction changes are there in the graph of a quartic function?
    A. 2 B. 0
    C. 3 D. 1
    Hint

  4.   Use a graphing calculator to write a polynomial function to model the set of data.
   
    A. 0.9x - 1.3 B. 0.9x + 1.3
    C. 1.3x - 0.9 D. 1.3x + 0.9
    Hint

  5.   Use the function of best fit, y = 0.9x + 1.3, to predict y when x = 5.
    A. 5.8 B. 2.3
    C. 6.7 D. 3.2
    Hint