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Chaps 6-7 Test[1] - MAT 106 CHAPTERS 6 AND 7.1-7.3 TEST...

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MAT 106 CHAPTERS 6 AND 7.1-7.3 TEST Name:  To earn full credit on any question, you must show  all  your work using EE or  MathType and have the correct solution. All questions carry equal weight to total  100 points. MULTIPLE CHOICE: 1. Which of the ordered pairs  (3, 1), (0, –4), (–4, 0), (–3, –7) are solutions for the equation  x  –  y  = 4? A) (0, –4), (–4, 0), and (–3, –7) B) (–4, 0) and (–3, –7) C) (0, –4) and (–3, –7) D) (3, 1) and (–4, 0) Ans: C) (0,-4) and (-3,-7) 4 4 4 4 3 4 1 0 4 4 4 4 8 3 4 7 x y y y x y - + - = + - - = - = - - = - - - = - - - = - 2. Which of the ordered pairs is a solution for the equation 4 x  – 2 y  = 8? Page 1 of 18
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4 2 2 8 8 2 8 4 8 2 4 8 2 2 2 2 4 0 4 4 2( 2) 4 4 4 8 2( 2) 4 4 4 8 2(0) 4 0 4 4 x y y y x y x y x y - + - = + - - = - = - = - = - - - = - - = - - - = - - = - - = - = - 3. An employee who produces  x  units per hour earns an hourly wage of  y  = 0.95 x  + 9 (in  dollars).  Find the hourly wage for an employee who produces 5 units per hour. 0.95(5) 9 13.75 y = + = 4. Give the coordinates of the point graphed below. Page 2 of 18
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5. Write the equation of the line with slope –2 and  y- intercept (0, 0).  Then graph the  line. A) y  = –2 x B) y  = –2 x C) y = x –  2 D) y = x –  2 Ans: B) Page 3 of 18
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2 2 2( 2) 4 y x x y y = - = - = - - =
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