Answers for 2.3

Copyright © by McDougal Littell, a division of Houghton Mifflin Company.
Answers for 2.3
For use with pages 82–85
2.3 Guided Practice
1. slope 2. horizontal
3. vertical 4. 3; rises
5. 21; falls
6. undefined slope; is vertical
7. 0; is horizontal
8. 2 1 } ; falls
3
9. 1 } ; rises
2
10. line 1 11. line 2
12. 1.5 in. per h
13. 26.25 pages per h
2.3 Practice and Applications
14. 2 15. 21
16. 0 17. 1 }
12
18. AB: positive, BC: undefined,
AC: zero
19. AB: positive, BC: negative,
AC: positive
20. AB: positive, BC: undefined,
AC: negative
21. 25; falls
22. undefined; is vertical
23. 1; rises 24. 2 }
3 ; rises
25. 22; falls 26. 0; is horizontal
27. 1 }
6 ; rises 28. 0; is horizontal
29. 2 1 }
4 ; falls
30.
y
2
1
negative; 2 5 }
8
31. b 32. a
33. d 34. c
35. line 2 36. line 2
37. line 1 38. line 2
39. 2 mi per h 40. 5 m per sec
41. 3 in. per day 42. 24 ft per wk
43. 228F per h 44. b
45. c 46. b and c
47. a and b 48. 2 3 }
1000
49. yes; 5 }
15 5 1 } 50.
3 4 }
7
51. 2 1 } 8F per ft
200
52. 268 gal per h
53. 11.5 MB per min
54. 1 55. 6
56. 1 57. 11
Algebra 2 Concepts and Skills
Answer Transparencies for Checking Homework A11
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;

Copyright © by McDougal Littell, a division of Houghton Mifflin Company.
Answers for 2.3 continued
For use with pages 82–85
2.3 Standardized Test Practice
58. a. 1 } b. 216 inches
12
c. Since the height remains
constant, shortening the ramp
will increase the slope and
lengthening the ramp will
decrease the slope.
59. C
2.3 Mixed Review
60. 1 61. 17
62. 26 63. 24
64. 11 65. 21
66. 3 67. 2 25
}
6
68. 3.7, 3, 2 69. 10, 11, 12
2.3 Geometry Skills
70. (8, 4); the slopes are all the same.
71. (1, 1); the slopes are all the same.
Quiz 1
1. The domain consists of inputs:
23, 1, 3, 4; the range consists of
outputs: 25, 6, 9; the relation is
a function; each input is mapped
onto exactly one output.
2. The domain consists of inputs:
24, 1, 2, 7; the range consists of
outputs: 25, 0, 3, 4; the relation
is not a function; the input 2 is
mapped onto outputs 3 and 4.
3.
4.
5.
6.
y
y
y
1
1
2
y
1
1
1
1
1
Algebra 2 Concepts and Skills
Answer Transparencies for Checking Homework A12
x
x
x
x

Copyright © by McDougal Littell, a division of Houghton Mifflin Company.
Answers for 2.3 continued
For use with pages 82–85
7. not linear; 3 8. linear; 21
9. linear; 10
}
3
11. 0
10. linear; 24
12. 1 13. 2
}
2
2 }
11
14. $45 per yr
Algebra 2 Concepts and Skills
Answer Transparencies for Checking Homework A13