Finite Mathematics & Its Applications
13th Edition by Larry J. Goldstein,
, Contents
Chapter 1: Linear Equations and Straight Lines 1–1
Chapter 2: Matrices 2–1
Chapter 3: Linear Programming, A Geometric Approach 3–1
Chapter 4: The Simplex Method 4–1
Chapter 5: Sets and Counting 5–1
Chapter 6: Probability 6–1
Chapter 7: Probability and Statistics 7–1
Chapter 8: Markov Processes 8–1
Chapter 9: The Theory of Games 9–1
Chapter 10: The Mathematics of Finance 10–1
Chapter 11: Logic 11–1
Chapter 12: Difference Equations and Mathematical Models 12–1
, Chapter 1
Exercises 1.1 5
6. Left 1, down
2
1. Right 2, up 3 y
y
(2, 3)
x
x
( –1, – 5
2 )
7. Left 20, up 40
2. Left 1, up 4 y
y
(–20, 40)
(–1, 4)
x
x
8. Right 25, up 30
3. Down 2 y
y
(25, 30)
x
x
(0, –2)
9. Point Q is 2 units to the left and 2 units up or
4. Right 2
y (2, 2).
10. Point P is 3 units to the right and 2 units down or
(3, 2).
x
(2, 0) 1
11. 2(1) (3)
2 1
1 so yes the point is
3
on the line.
5. Left 2, up 1 1
y 12. 2(2) (6)
1 is false, so no the point is not
3
on the line
(–2, 1)
x
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, Chapter 1: Linear Equations and Straight Lines ISM: Finite Math
1 24. 0 = 5
13. 2 x y
1 Substitute the x and y no solution
3
coordinates of the point into the equation: x-intercept: none
When x = 0, y = 5
1 ¬ ¬
,3 l 2 1 1 3
1 l 1 1
1 is y-intercept: (0, 5)
2 ® 2 ® 3
a false statement. So no the point is not on the 25. When y = 0, x = 7
line. x-intercept: (7, 0)
0=7
1¬ 1¬ no solution
14. 2 (1)
1 is true so yes the point is y-intercept: none
3 ® 3 ®
on the line. 26. 0 = –8x
x=0
15. m = 5, b = 8 x-intercept: (0, 0)
y = –8(0)
16. m = –2 and b = –6
y=0
17. y = 0x + 3; m = 0, b = 3 y-intercept: (0, 0)
2 2 1
18. y
x 0; m
, b
0 27. 0
x – 1
3 3 3
x=3
19. 14 x 7 y
21 x-intercept: (3, 0)
1
7 y
14 x 21 y
(0) – 1
3
y
2 x 3
y = –1
y-intercept: (0, –1)
20. x y
3 y
y
x 3
y
x 3
(3, 0)
x
21. 3 x
5
(0, –1)
5
x
3
1 2 28. When x = 0, y = 0.
22. – 2 x y
10
3 When x = 1, y = 2.
2 1 y
y
x 10
3 2
3
y
x 15 (1, 2)
4 x
(0, 0)
23. 0
4 x 8
4x
8
x
2
x-intercept: (2, 0)
y = –4(0) + 8
y=8
y-intercept: (0, 8)
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