4.1 Coordinates
September 16, 2013
4.1 Coordinates
A coordinate plane is formed by two real number lines that intersect at a right angle.
Each point has two Coordinates: ( x, y). Each point is also referred to as an ordered
pair.
*The inverse of the ordered pair (x,y) is (y,x)*
ordered pair- (x,y)
Quadrant 2
(-,+)
Quadrant 3
(-,-)
Quadrant 1
(+,+)
origin (0,0)
Quadrant 4
(+,-)
vertical or
y-axis
horizontal or
x-axis
4.1 Coordinates
September 16, 2013
plotting points- A = (3,2) (over 3, up 2)
from the origin
Name the quadrant:
x = (-3,4)
Name the quadrant:
C = (-2,-5)
Name the quadrant: