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Name _______________________________________ Date __________________ Class __________________ Midterm Review Sheet #1 Select the best answer. Grid your answer into the box to the left. Write answers to the questions below. 1.A vacation home in Orlando, Florida, rents for $105 per day. The function f(x) 105x gives the cost of renting the home for x days. What is the domain of this function? F x0 1. G {0, 1, 2, 3, ...} 2. H {0, 105, 210, 315, ...} J all real numbers 3. 4. 5. 6. 4. Find the slope of this line. 2. A parking meter gives 30 minutes for each quarter and 6 minutes for each nickel. The equation 30x 6y 60 describes the number of quarters x and nickels y that you need to park for 60 minutes. What does the x-intercept represent? A You need 2 quarters and no nickels to park for 60 minutes. B You need 10 nickels and no quarters to park for 60 minutes. C You need 6 nickels and no quarters to park for 60 minutes. D You need 30 quarters and no nickels to park for 60 minutes. 3.This table shows the U.S. federal minimum hourly wage in different years. During which time interval did the wage increase at the greatest rate? Year 1979 1980 1981 1990 1991 Wage ($) 2.90 3.10 3.35 3.80 A 5 2 C 2 5 B 2 5 D 5 2 5. Find the slope of the line that contains the points (1, 1) and (2, 8). F 5 H 7 3 G 3 J 1 3 6.Which equation describes the line with a slope of 5 and y-intercept of 3? F y 3x 5 H y 5x 3 G y 3x 5 J y 5x 3 4.25 F 1979 to 1980 H 1981 to 1990 G 1980 to 1981 J 1990 to 1991 Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Algebra 1 Name _______________________________________ Date __________________ Class __________________ 10.Here are four linear equations. 7.What is the slope and y-intercept of the graph? I 4x 3y 15 III y 1 II 3x 4y 8 4 3 (x – 6) IV y x 5 3 4 Which pair of lines are parallel? Write answers to the questions below. 8. 12. 13. G I and III J III and IV A y 2x 4 9. 11. H II and IV 11. Which equation describes a line that passes through (6, 8) and is perpendicular to the line described by y 2x 4? 7. 10. F I and II 1 , y-intercept 2 4 1 B slope , y-intercept 3 4 C slope 4, y-intercept 4 D slope 4, y-intercept 4 A slope B y 1 x5 2 C y 1 x 11 2 D y 2x 20 12. Graph f(x) 3x 4 and g(x) 3x 4. Which describes the transformation(s) from the graph of f(x) to the graph of g(x)? 8. Which equation describes the line with a slope of 2 that contains the point (4, 3)? F. y 4 2(x 3) H. y 3 2(x – 4) G. 2(y – 3) x 4 J. 2(y 4) x 3 9. The table shows the age of several people and how many hours a day they spend playing computer and/or video games. Age (yrs) 15 63 33 22 15 F a reflection across the y-axis Playing (hrs/day) 5 0 2 8 0 G a reflection across the y-axis and a translation 4 units up Which equation could represent a line of best fit for this data? A y ≈ 53x – 7.9 B y ≈ –7.9x + 53 C y ≈ 5.3x – 0.079 D y ≈ –0.079x + 5.3 H a rotation (less steep) about (0, 4) J a translation up 6 units 13.Which ordered pair is a solution of x y 3 ? 2x y 0 A (3, 0) C (0, 0) B (1, 2) D (1, 4) Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Algebra 1 Name _______________________________________ Date __________________ Class __________________ 14. The graph of a system of linear equations is shown below. What is the solution of the system? Write answers to the questions below. C inconsistent D independent 19. Which linear equation best fits this data set? 15. 16. 17. 18. F (0, 3) H (2, 4) 19. G (0, 6) J (6, 0) 21. A consistent B dependent 14. 20. 18.Which term describes a system with no solution? y x 3 . 15. Solve by substitution: 2x y 9 A (1.5, 4.5) B (2, 5) x 1 4 6 8 11 y 2 3 6 5 8 3 5 x 5 4 2 5 G y x 3 2 F y H yx1 J y 4 1 x 3 2 20. Which of these is the domain and range 2 for the parent function of 3 x 1 2 ? A Domain: x 0 Range: y 0 C (3, 6) B Domain: all real numbers Range: D (6, 9) 3x 2y 1 . 16. Solve by elimination: x 2y 11 F (5, 8) H (3, 4) 5 17 G ,- 2 4 7 J 4, 2 y 0 C Domain: all real numbers Range: y 0 D Domain: x 0 Range: y 0 21. Which is the type of correlation shown? 17. Sam needs to make a long-distance call from a pay phone. With his prepaid phone card, he will be charged $1.00 to connect and $0.50 per minute. If he places a collect call with the operator he will be charged $3.00 to connect and $0.25 per minute. In how many minutes will the phone card and the collect call cost the same? A 5 min B 5 1 min 3 F no correlation H positive G negative J zero C 8 min D 16 min Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Algebra 1 Name _______________________________________ Date __________________ Class __________________ 22. Which is the best estimate of the correlation coefficient? 27. What is the minimum or maximum of g x 9x 2 6x 1? Write answers to the questions below. 1 1 F minimum: , 0 H minimum: (3, 0) 3 G maximum: , 0 J maximum: (3, 0) 3 22. 28. What are the zeros of the trinomial 2x 2 3x 1? 23. 24. 25. 26. 27. 28. 29. 30. 31. F -0.92 H 0.92 G 0 J 1 A 1,1 23. Using f ( x ) x 2 , what is the transformation that yields f ( x ) 3 x 2 3 ? 2 F vertical stretch of 2, shift 3 units left and 3 units down G shift 12 units left and 3 units down C 1, 1 2 2 B 2, 1 D 1, 2 29. What is a quadratic function in standard form having zeros of 3 and 1 H vertical stretch of 2, shift 2 units right and 3 units down F f ( x ) x 3 x 2 J vertical stretch of 3, shift 2 units left and 3 units down G f ( x ) 2x 2 5 x 3 24. What is the simplified version of i 18 225 ? A 15i C 15i B 15 D 15 1 ? 2 1 H f ( x ) x 3 x 2 J f ( x ) 2x 5 x 3 2 30.For the discriminant 5 2 4 4 2, What is the number of solutions and their type(s)? 25. Use the quadratic formula to solve 3x 2 10x 3 = 0. F x 1 3 H x B 1 real solution 1 ,3 3 J x 3, G x 3 i A 2 imaginary solutions C 1 imaginary solution 1 3 26. Consider h x 3x 6x 2 .What is its D 2 real solutions 31.Simplify i 10 4 i 10 4 . 2 vertex and y-intercept? A vertex: (1, 1), y-intercept: (0, 2) A 10i 2 16 C 10 4 B 6 D 26 B vertex: (2, 2), y-intercept: (0, 2) C vertex: (1, 1), y-intercept: (0, 2) D vertex: (2, 1), y-intercept: (0, 2) Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Algebra 1 Name _______________________________________ Date __________________ Class __________________ 32. Simplify 3 4i . 1 4i Write answers to the questions below. 32. F 13 16i 17 G 13 17 H 13 8i J 19 8i 17 33. Write a quadratic equation that fits the points (2, 27), (4, 61), and (7, 142). 33. A x2 10x 3 C 2x2 4x 13 34. B x2 11x 1 D 2x2 5x 9 34. Carmen is standing on the ground. She tries to throw a tennis ball over her house, but it hits the roof on the way down at a height of 33 feet. The quadratic equation that models the path of the ball is b(t) 16t2 56t. How long did it take for the ball to hit the roof after it left Carmen’s hand? F 0.75 seconds H 2.25 seconds G 1.5 seconds J 2.75 seconds Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Algebra 1