A. How do you find the point described by an ordered pair?

Question

B. How do you find in which quadrant an ordered pair is located?
C. How do you use a graph to build a table?

Answer 1

A. the first number tells you how far left or right to go (right=positive, left = negative) and the second tells how far up or down (up pos down neg)

B. The quadrants are :
I upper right
II upper left
III lower left
iV lower right

C. Just write the coordinates from each ppoint in a table with headings x and y

Answer 2

A.
The left number is the x value, which gives you the distance right or left of the y axis. + = right and - = left
The right number is the y value, or the distance from the x axis. + = up and - = down.

B.
You find the quadrant in which the point is located by examining the signs of the data:
+,+ =1st quadrant.
-,+ = 2nd quadrant.
-,- = 3rd quadrant.
+,- = 4th quadrant.

..2....|....1
(-,+).|.(+,+)
--------------
(-,-)..|.(+,-)
..3....|....4

(The purist will use Roman numerals instead of Arabic)

C.
To build a table from a graph, select points on the graph and enter the x value in the x column and the y value in the y column. Start at one end of your graph and work towards the other to maintain order in your table.

Answer 3

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Answer 4

also see http://www.wtamu.edu/academic/anns/mps/math/mathlab/beg_algebra/beg_alg_tut20_rect.htm