Exam 4: Systems of Linear Equations and Inequalities

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Complete the graph by shading the correct region. -x - y \ge 9  Complete the graph by shading the correct region. -x - y  \ge 9

(Multiple Choice)
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Determine whether the graphs of the equations are parallel lines, perpendicular lines, or neither. -4x - 2y = 7 3x + 3y = 7

(Multiple Choice)
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The table shown was generated by a graphics calculator. The expression y1 represents f(x). -The table shown was generated by a graphics calculator. The expression y<sub>1 </sub>represents f(x). -  All the points lie on a straight line. What is the slope of the line? All the points lie on a straight line. What is the slope of the line?

(Multiple Choice)
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Decide whether the equation defines y as a function of x. (Remember that to be a function, every value of x must give one and only one value of y.) -y = x2 - 3

(True/False)
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Solve the problem. -Suppose that sales of a particular brand of appliance satisfy the relationship y = 130x + 4800, where y represents the number of sales in year x, with x = 0 corresponding to 1992. Find the number of sales in 1998. Solve the problem. -Suppose that sales of a particular brand of appliance satisfy the relationship y = 130x + 4800, where y represents the number of sales in year x, with x = 0 corresponding to 1992. Find the number of sales in 1998.

(Multiple Choice)
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Graph the linear equation. -x + y = 7 Graph the linear equation. -x + y = 7

(Multiple Choice)
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After reading the sentence, correctly fill in the blank with one of the following inequality symbols: <, >, c, or c. -To be eligible to vote, one must be at least 18 years of age. Voters must be _____ 18 years of age.

(Multiple Choice)
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Answer the question. -The ordered pair (1, ) is a solution of the equation y = 7.

(Short Answer)
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Tell whether or not the relation is a function. -{(- 1, - 3), (3, 9), (6, 9), (7, - 8), (10, - 3)}

(True/False)
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Decide whether the slope is positive, negative, zero, or undefined -Decide whether the slope is positive, negative, zero, or undefined -

(Multiple Choice)
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State whether the graph is or is not that of a function. -State whether the graph is or is not that of a function. -

(Multiple Choice)
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Tell whether or not the relation is a function. -{(- 6, - 4), (- 6, 9), (1, 1), (6, 4), (9, - 9)}

(True/False)
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Evaluate the function. -Given f(x) = 12x + 18, find f(- 1).

(Multiple Choice)
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Find the slope of the line. -x + 8 = 0

(Multiple Choice)
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Solve the problem. -A hardware store owner advertises a certain brand of drill. Each month he changes the price (in dollars) of the drill and tracks the number of units sold. His sales can be approximated by the equation y = - 3x + 34, where x represents price and y represents sale. Complete the table, and make a scatter diagram of the data. Solve the problem. -A hardware store owner advertises a certain brand of drill. Each month he changes the price (in dollars) of the drill and tracks the number of units sold. His sales can be approximated by the equation y = - 3x + 34, where x represents price and y represents sale. Complete the table, and make a scatter diagram of the data.

(Essay)
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Find the slope of the line. -Through (5, 3) and (9, - 5)

(Multiple Choice)
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Solve by graphing. Label the axes and show where the solution is located on the graph. -The cost, c, in dollars of car rental is 5 + 0.25m, where m is the number of miles driven. Graph the equation and use the graph to estimate the cost of car rental if the number of miles driven is 26. Solve by graphing. Label the axes and show where the solution is located on the graph. -The cost, c, in dollars of car rental is 5 + 0.25m, where m is the number of miles driven. Graph the equation and use the graph to estimate the cost of car rental if the number of miles driven is 26.    Solve by graphing. Label the axes and show where the solution is located on the graph. -The cost, c, in dollars of car rental is 5 + 0.25m, where m is the number of miles driven. Graph the equation and use the graph to estimate the cost of car rental if the number of miles driven is 26.

(Multiple Choice)
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Decide whether or not the ordered pair is a solution to the equation -x + y = 7; (2, 5)

(True/False)
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Find the slope of the line going through the given pair of points. -(3.9, 4.4) and (3.4, 1.9)

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Find the slope of the line going through the given pair of points. -Find the slope of the line going through the given pair of points. -

(Multiple Choice)
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