1.   State the domain and the range of the relation {(1, 2), (-4, 2), and
(3, 5)}. Then state whether the relation is a function.
    A. The domain is {-4, 1, 3},
the range is {2, 5}, and the relation is a function.		 B. The domain is {2, 5}, the range is {-4, 1, 3}, and the relation is not a function.
    C. The domain is {2, 5}, the range is {-4, 1, 3}, and the relation is a function. D. The domain is {-4, 1, 3}, the range is {2, 5}, and the relation is not a function.
    Hint
  2.   State the domain of (x) for f(x) = and g(x) =
    A. B.
    C. D.
    Hint
  3.   Use a graphing calculator to find the equation of the regression line.
   
    A. y = 23x - 21,000 B. y = x - 576
    C. y = 2x - 25 D. y = 12x - 23,947
    Hint
  4.   Three planes can
    A. have no points in common. B. All of the choices are true.
    C. intersect at one point. D. intersect in a line.
    Hint
  5.   Find the values of x and y for which the matrix equation
is true.
    A. x = -1, y = -3 B. x = -3, y = -1
    C. x = -3, y = 1 D. x = 1, y = -3
    Hint
  6.   Which of the following shows the system of equations using a matrix equation?
   
    A. B.
    C. D.
    Hint
  7.   If the lumber mill can turn out 900 units of product each week and must produce 100 units of lumber and 400 units of plywood, graph the systems of inequalities. Let
x = units of lumber, and y = units of plywood.
    A.
    B.
    C.
    D.
    Hint
  8.   Find the first three iterates of the function g(x) = x2 + x for an initial value of x0 = 1.
    A. = 2
= 6
= 12

 B. = 2
= 6
= 36
    C. = 2
= 6
= 42

 D. = 0
= 2
= 4
    Hint
  9.   Graph the equation 3x + 2y = 0
    A. B.
    C. D.
    Hint
  10.   Write an equation in slope-intercept form with a slope of that passes through the point (-3, -5).
    A. B.
    C. D.
    Hint
  11.   Write the equation of the line that is parallel to 2x - 3y - 15 = 0 and that passes through the point (3,4).
    A. 2x - 3y + 6 = 0 B. 2x + 3y + 6 = 0
    C. 2x - 2y + 6 = 0 D. 2x + 5 - 3 = 0
    Hint
  12.   Write the equation of the line perpendicular to 5y + 3x - 10 = 0 and that passes through the point (3,1).
    A. 5x - 3y - 4 = 0 B. 3x + 5y - 50 = 0
    C. 5x - 3y - 12 = 0 D. 5x + 3y - 12 = 0
    Hint
  13.   Determine two points that appear to represent the data in the scatter plot. Then find and interpret the slope.
   
    A. Paul's test scores improve an average of 3 points with each test.
    B. Paul's test scores are neither increasing nor decreasing.
    C. Paul's test scores improve an average of 15 points with each test.
    D. Paul's test scores improve an average of 5 points with each test.
    Hint
  14.   If you are solving this system of equations by elimination, which of the following is the best choice for the first step?

2x + 3y - z = 4
-x + y + 2z = 3
3x + y + z = 1
    A. Method II B. Method I
    C. both methods are correct D. neither method is correct.
    Hint
  15.   Find the values of x and y for which the matrix equation is true.
    A. x = 4, y = 2 B. x = 2, y = 3
    C. x = 3, y = 2 D. x = 1, y = 0
    Hint
  16.  
    A. impossible B.
    C. [4 5 6] D. [-1 1 18]
    Hint
  17.   Given A = [3 -2], C = , find AC.
    A. impossible B.
    C. [14 3 13] D. [-10 -4 -2]
    Hint
  18.   Find the inverse of .
    A. 0 B.
    C. D. does not exist
    Hint
  19.   Set up a matrix equation for this chemistry problem. How many liters of 0.25 solution and 0.40 solution should be combined to make 10 liters of 0.35 solution?
    A. B.
    C. D.
    Hint
  20.   Solve the system of inequalities by graphing.
x + y 4
2x - y < 4
y 0
    A. B.
    C. D.
    Hint

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