ore C ommon Core Edition APlgebra Algebra 1 ESTS RACTICE PRACTICE TESTS Topical Review Book Company Topical Review Book Company

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1 C ommon Core ommon Edition C ore Edition Algebra 1 APlgebra 1 T RACTICE ESTS Answer Keys PRACTICE TESTS Topical Review Book Company Topical Review Book Company

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3 TEST 1 Part I For parts II, III, and IV, partial credit should be given for answers that include, but not limited to, the following; - correct answer, but no work shown - incorrect answer, but rest of work is appropriate - appropriate work is shown, but one computational or rounding error is made Part II 25. $ x(x + 2)(x 3) 27. A point in the shaded region is stated along with justification. 28. x = 4, Yes, x = 1and y = 5 are the solutions to the equation 3x 2 = x 6 and work is shown for the check. 31. f( 2) = f(x) = (x 1) (1, 7) Part III A point in the shaded region of the graph is stated. 34. a) 205 pounds b) 3 pounds c) 15 months 35. a) 4 years b) y = 4(2) x 36. Box Plot of Ages Part IV 37. Solution (1, 1) and/or (1.5, 1.25)

4 TEST 2 Part I For parts II, III, and IV, partial credit should be given for answers that include, but not limited to, the following; - correct answer, but no work shown - incorrect answer, but rest of work is appropriate - appropriate work is shown, but one computational or rounding error is made Part II 25. y = 1 x [0, ] or equivalent explanation 27. 2(x 1)(3x + 1) 28. $7, (b + 4) b x 4 x 3 2x 2 + 2x h( 2) = chairs for guests Part III 33. a) x < x or x > x where x is the month of the year b) August December (x > 7) 34. a) b) y = 3x

5 35. An appropriate graph is drawn such as the one to the right: 10 x 10, 100 x 100 The graph is labeled appropriately. Function Rule: y = 3 x or equivalent equation f(x) x a) y = 2.85x b) correlation coefficient r = 0.95 c) The correlation between the linear regression equation and the data is good as r = If the correlation is good, the correlation coefficient is quite close to either 1 or is very close to a) f(h) = h b) 0 h 20 is the domain Part IV c) Appropriate graph and scale are drawn.

6 TEST 3 Part I For parts II, III, and IV, partial credit should be given for answers that include, but not limited to, the following; - correct answer, but no work shown - incorrect answer, but rest of work is appropriate - appropriate work is shown, but one computational or rounding error is made Part II 25. 4, { 9} 27. 2x 4 + x 3 + 7x 2 + 4x { 16} or (0, 16) 29. f(x) =22x 45 or equivalent function 30. A(d) = d 2 π( 1 2 d)2 or equivalent function 31. x = 2, 10; a method is chosen with an appropriate justification. 32. a) b) median grade is Part III 33. a) y = 9.48x b) $ x-intercepts: ( 5, 0),( 1, 0) 3 2 y-intercept: (0, 5) 1 Vertex is a maximum: ( 3, 4) a) C(d) = d b) $2000 c) They would make $ Part IV 7 is the average rate of change. 3

7 AUGUST 2014 Part I For parts II, III, and IV, partial credit should be given for answers that include, but not limited to, the following; - correct answer, but no work shown - incorrect answer, but rest of work is appropriate - appropriate work is shown, but one computational or rounding error is made Part II and 6, and correct algebraic work is shown, such as factoring. 26. B = 3000( ) t or an equivalent equation in terms of B and t is written ,000, and correct work is shown x x x 50 and correct work is shown. 29. g(x), and a correct justification is given. y x

8 30. 6, and correct work is shown. 31. A correct plot is drawn, poor fit is stated, and a correct justification is written, such as stating that a pattern is formed. Residual 32. 9, and a correct explanation is written. that creates a perfect square trinomial. Explain how the value of c is determined. Part III 33. A correct graph of f(x) is drawn. A correct relationship for g(x) is described, such as g(x) is two units below f(x). A correct relationship for h(x) is described, such as h(x) is shifted 4 units to the right of f(x) A hb 2 or an equivalent expression and 8, and correct work is shown. h

9 35. Both functions are graphed correctly, and 2 and 1 are stated and 100, and correct algebraic work is shown. Part IV 37. x + y 15 and 4x + 8y 80 are stated. Both inequalities are graphed and shaded correctly with at least one labeled correctly. A correct combination of babysitting hours and library hours is stated. Graph these inequalities on the se axes below.

10 JANUARY 2015 Part I For parts II, III, and IV, partial credit should be given for answers that include, but not limited to, the following; - correct answer, but no work shown - incorrect answer, but rest of work is appropriate - appropriate work is shown, but one computational or rounding error is made Part II 25. Correct, and a correct justification is given %, and correct work is shown. 27. ( 4, 1), and a correct explanation is given x 2 + 6x + 4 or equivalent trinomial, and correct work is shown and 1 2, and correct algebraic work is shown.

11 30. A correct graph is drawn or 2.4, and correct 5 algebraic work is shown. 32. y = 0.25(2) x or an equivalent equation is written, and a correct explanation is given.

12 Part III 33. A correct system of equations is written, popcorn = $5.75, drink = $2.25 and correct work is shown. 34. y 2x 3, a correct graph, and disagree, and a correct explanation is written. a) b) c) and a correct explanation is written. 36. Maximum is stated, a correct explanation is written, and f(x) = (x 4) , and correct work is shown using completing the square. a) b)

13 Part IV 37. (x 3)(2x) = 1.25x 2 or an equivalent quadratic in one variable is written, a correct explanation is written, 80, and correct work is shown.