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Linear Equations in Two Variables 2
A
B
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D
Result
. . . .

Choose the correct answer to each question.

1. What is the domain of the relation
R={ (6,  −2),  (3,  −1),  (2,  0), 
(3,  1),  (6,  2) }?
{2}
{2,  3,  6}
{−2,  −1,  0,  1,  2}
{−2,  −1,  0,  1,  2,  3,  6}
Answer: { 2 ,    3 ,    6 }
2.
 What is the range of the relation
R={ (6,  −2),  (3,  −1),  (2,  0), 
(3,  1),  (6,  2) }?
{2}
{2,  3,  6}
{−2,  −1,  0,  1,  2}
{−2,  −1,  0,  1,  2,  3,  6}
Answer: { − 2 ,    − 1 ,    0 ,    1 ,    2 }
3. Who among the following mathematicians is credited for introducing the rectangular coordinate system on a plane?
Archimedes
Pythagoras
Descartes
Oughtred
Answer: Descartes
4. In which quadrant of the rectangular coordinate plane can you locate the point with coordinates ( − 3 2 ,  − 1 2 )?
I
II
III
IV
Answer: III
5. Where can you locate the point with coordinates (0,  −π)?
positive x-axis
positive y-axis
negative x-axis
negative y-axis
Answer: negative y-axis
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