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 Algebra:  Coordinates
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 A coordinate point has value which corresponds to a point on the "x" axis and a value which corresponds to a point on the "y" axis. For example:  If point A is at (3, 1) and point B is at (3, 4), what is the distance                      between point A and point B?    STRATEGY:  Draw the x axis and the y axis and plot the coordinate points.                     Remember: The "x" axis is horizontal. The "y" axis is vertical.             Solution:  Point A is 3 to the right and 1 up.                            Point B is 3 to the right and 4 up.                          The line connecting the two points is vertical,                            and the distance between the two points is 3.Example two:  In a set of coordinates, point A is (0, 1) and point B is (3, 0).                      What is the slope of the line connecting the two points?STRATEGY:  Remember:  the slope of a line is the "rise" over the "run"                     The rise is the difference between the y coordinate points,                      and the run is the difference between the x coordinate points.              Solution:  The "rise" is one minus zero or one.  1 -  0  =  1                           The "run" is zero minus three or negative three.  0  -  3  =  -3                          The "slope" is one divided by negative three or negative one-third.                           The answer is   1  /  -3  or  - 1 / 3SAT TIP: Many SAT slope problems can be answered just by                 knowing that a positive slope rises from left to right                  and a negative slope falls from left to right.     Practice with these examples:               An easy problem for scores from 200 to 400         A moderate problem for scores from 400 to 600         A difficult problem for scores from 600 to 800 For more practice:          Click here for problems in The Official SAT Study Guide.              Click here to return to Web Book Access
 Many students believe the SAT is a test of advanced math, but the SAT has only arithmetic, algebra, and geometry - no trigonometry or calculus.
 SAT TIP: In a pair of coordinate points,                 read the "x" coordinate first                 and the "y" coordinate second.
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