1 Which relation is not a function?

(1) y = 2x + 4             (3) x = 3y - 2
(2) y = x2 - 4x + 3      (4) x = y2+2x - 3

1         2         3         4        


2 The solution set of |3x + 2| < 1 contains

(1) only negative real numbers
(2) only positive real numbers
(3) both positive and negative real numbers
(4) no real numbers

1         2         3         4        

3 In the accompanying diagram, cabins B and G are located on the shore of a circular lake, and cabin L is located near the lake. Point D is a dock on the lake shore and is collinear with cabins B and L. The road between cabins G and L is 8 miles long and is tangent to the lake. The path between cabin L and dock D is 4 miles long.

What is the length, in miles, of BD?

(1) 24      (3) 8
(2) 12      (4) 4

1         2         3         4        

1         2         3         4        

5 Which transformation is a direct isometry?

(1) D2           (3) ry-axis
(2) D-2          (4) T2,5

1         2         3         4