1. The equation of the horizontal line passing through (1, -5) is _______

A. x = 1

B. y = 1

C. x = -5

D. y = -5

2. The standard form of the inequality x - 4y 12 is _______

A. y> - ¼ x + 3

B. 4y < x - 12

C. y< ¼ x - 3

D. y> ¼ x - 3

3. Which of the following points satisfies the linear inequality 3x - y 10? _______

A. (2, -1)

B. (3, 0)

C. (4, 3)

D. (5, 4)

4. Which of the following equations does the graph represent? _____

A. y = 2x + 1

B. y = (1/2)x 1

C. y = (1/2)x + 1

D. y = 2x - 2

5. The unshaded (white) portion of the graph is the solution set of which inequality? ______

A. y 2x + 4

B. y 2x + 4

C. y 2x 4

D. y 2x 4

6. Which of the following points is in the feasible set of the system of inequalities?

y >0
x + y < 7
2x + y < 9

A. (1, 5)

B. (3, 4)

C. (4, -6)

D. (5, 1)

7. Which of the following is TRUE about the line through the points (2, 5) and
(2, 7)? _______

A. The slope is undefined.

B. The slope is negative.

C. The slope is 0.

D. The slope is positive.

8. What is the equation of a line having slope 5 and passing through the point
(3, 7)? ______

A. y = 3x 2

B. y = 5x 8

C. y = 5x 2

D. y = 5x 

SECTION 2.1 # 36......PAGE 68 (CHAPTER 2)

9. Solve the linear system by using the GAUSSIAN elimination method. (SHOW ALL WORK)

-2x - 3y +2z = -2

x + y = 3

-x - 3y + 5z = 8