Expressions and Equations

Expressions and Equations - MULTIPLE CHOICE. Choose the one...

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Find the slope of the line passing through the given pair of points. 1) ( 5, 4) and ( 2, 2) 1) _______ A) B) C) D) - Find the slope of the line. 2) A line parallel to -4x = 5y + 11 2) _______ A) - B) - C) D) - Use the echelon method to solve the system. 3) + = 0 - = - 5 3) _______ A) ( 5, 6) B) ( -5, 5) C) ( -6, 6) D) No solution Compute r, the coefficient of correlation. 4) The following are costs of advertising (in thousands of dollars) and the number of products sold (in thousands): 4) _______ A) .2635 B) -.3707 C) .6756 D) .6112 Write a cost function for the problem. Assume that the relationship is linear. 5) Marginal cost, $ 130; 40 items cost $ 6100 to produce 5) _______ A) C(x) = 130x + 6100 B) C(x) = 23x + 900 C) C(x) = 130x + 900 D) C(x) = 23x + 6100 Graph the equation. 6) x = -6 Compute r, the coefficient of correlation. 7)  The test scores of 6 randomly picked students and the number of hours they prepared are  as follows:   7)     _______   A) .6781   B)    -.6781   C)    .2242   D)    -.2242     Solve the problem. 8)  After two years on the job, an engineer's salary was  $40,000. After seven years on the  job, her salary was  $56,000. Let y represent her salary after x years on the job. Assuming  that the change in her salary over time can be approximated by a straight line, give an  equation for this line in the form y = mx + b.   8)  
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Expressions and Equations - MULTIPLE CHOICE. Choose the one...

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