Chapter 2 Quiz: Linear Models, Equations & Inequalities

10 Questions | Total Attempts: 52

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Chapter 2 Quiz:  Linear Models, Equations & Inequalities

This is a quiz. You will be graded on correctness.


Questions and Answers
  • 1. 
    Solve  .
    • A. 

      3/7

    • B. 

      25/7

    • C. 

      -1

    • D. 

      1

  • 2. 
    Solve  
    • A. 

      1/4

    • B. 

      -1/4

    • C. 

      4

    • D. 

      -4

  • 3. 
    Solve .
    • A. 

      1

    • B. 

      -1

    • C. 

      5/3

    • D. 

      -1/4

  • 4. 
    Solve .
    • A. 

      X > -12

    • B. 

      X < -12

    • C. 

      X > -7

    • D. 

      X < -7

  • 5. 
    Using the table on pg 155 #38 in your textbook, find the linear model that is the best fit for the data to 3 decimal places, where x is the number of years after 2000.
    • A. 

      Y = 16283.726x + 271.595

    • B. 

      Y = ax + b

    • C. 

      Y = 271.595x + 16283.726

    • D. 

      Y = 271.595x - 526906.75

  • 6. 
    Using your answer from #5, what does the model predict the population will be in 2020?
    • A. 

      21,715 people

    • B. 

      21,716 people

    • C. 

      564,905 people

    • D. 

      564,906 people

  • 7. 
    Solve for x and y by graphing: y = 2x + 3  and y = -4x + 12
    • A. 

      X = 1.5, y = 6

    • B. 

      X = -4.5, y = -6

    • C. 

      X = 2, y = 6

    • D. 

      X = 2.5, 2

  • 8. 
    Solve for x and y using substitution: 4x - 2y = 10  and y = -3 - 2x
    • A. 

      X = -2.2, y = 1.4

    • B. 

      No solution

    • C. 

      X = 1.4, y = -2.2

    • D. 

      X = 0.5, y = -4

  • 9. 
    Solve for x and y using elimination/combination: 3x + 2y = 0   and 2x -  y =  7
    • A. 

      X = 1.4, y = 7

    • B. 

      X = 2, y = -3

    • C. 

      X = 1, y = -5

    • D. 

      X = -1, y = 9

  • 10. 
    The average salary of  clasroom teacher in the United States is given by the function f(t) = 982.06t + 32903.77, where t is the number of years after 1990.  In what year was the average teacher salary $40,760.25 according to the model?
    • A. 

      2008

    • B. 

      1998

    • C. 

      8

    • D. 

      40061914.89

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