9-3 The Coordinate Plane Learn to locate and graph points on the coordinate plane.
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Transcript of 9-3 The Coordinate Plane Learn to locate and graph points on the coordinate plane.
9-3 The Coordinate Plane
Learn to locate and graph points on the coordinate plane.
9-3 The Coordinate Plane
Vocabularycoordinate planeaxesx-axisy-axisquadrantsorigincoordinatesx-coordinatey-coordinate
9-3 The Coordinate Plane
A coordinate plane is formed by two number lines in a plane that intersect at right angles. The point of intersection is the zero on each number line.
• The two number lines are called the axes.
9-3 The Coordinate Plane
A coordinate plane is formed by two number lines in a plane that intersect at right angles. The point of intersection is the zero on each number line.
• The horizontal axis is called the x-axis.
9-3 The Coordinate Plane
A coordinate plane is formed by two number lines in a plane that intersect at right angles. The point of intersection is the zero on each number line.
• The vertical axis is called the y-axis.
9-3 The Coordinate Plane
A coordinate plane is formed by two number lines in a plane that intersect at right angles. The point of intersection is the zero on each number line.
• The two axes divide the coordinate plane into four quadrants.
9-3 The Coordinate Plane
A coordinate plane is formed by two number lines in a plane that intersect at right angles. The point of intersection is the zero on each number line.
• The point where the axes intersect is called the origin.
9-3 The Coordinate Plane
Additional Example 1: Identifying Quadrants
Name the quadrant where each point is located.
A. X
B. Y
C. S
Quadrant IV
Quadrant III
Quadrant II
9-3 The Coordinate Plane
Check It Out: Example 1
Name the quadrant where each point is located.
A. V
B. Z
C. T
Quadrant I
y-axis
Quadrant IV
Points on the axes are not in any quadrant.Helpful Hint
no quadrant
9-3 The Coordinate Plane
An ordered pair gives the location of a point on a coordinate plane. The first number tells how far to move right (positive) or left (negative) from the origin. The second number tells how far to move up (positive) or down (negative).
The numbers in an ordered pair are called coordinates. The first number is called the x-coordinate. The second number is called the y-coordinate.
The ordered pair for the origin is (0,0).
9-3 The Coordinate Plane
Additional Example 2A: Locating Points on a Coordinate Plane
Give the coordinates of each point.
XFrom the origin, X is 4 units right and 1 unit down.
(4, –1)
9-3 The Coordinate Plane
Additional Example 2B: Locating Points on a Coordinate Plane
Give the coordinates of each point.
Y
(–2, –3)
From the origin, Y is 2 units left, and 3 units down.
9-3 The Coordinate Plane
Additional Example 2C: Locating Points on a Coordinate Plane
Give the coordinates of each point.
SFrom the origin, S is 3 units left, and 3 units up.
(–3, 3)
9-3 The Coordinate Plane
Check It Out: Example 2A
Give the coordinates of each point.
V
From the origin, V is 4 units right and 2 units up.
(4, 2)
9-3 The Coordinate Plane
Check It Out: Example 2B
Give the coordinates of each point.
Z
(0, 4)
From the origin, Z is 0 units right, and 4 units up.
9-3 The Coordinate Plane
Check It Out: Example 2C
Give the coordinates of each point.
T
From the origin, T is 1 unit right, and 3 units down.
(1, –3)
9-3 The Coordinate Plane
Additional Example 3: Graphing Points on a Coordinate Plane
Graph each point on a coordinate plane.
A. V(4, 2)
B. W(–3, 1)
x
y
–4 –2 0 2 4
4
2
–2
–4
From the origin, move 4 units right, and 2 units up.
VW
From the origin, move 3 units left, and 1 unit up.
9-3 The Coordinate Plane
Additional Example 3: Graphing Points on a Coordinate Plane
Graph each point on a coordinate plane.
C. Z(0, 4)
D. T(1, –3)
From the origin, move 4 units down.
x
y
–4 –2 0 2 4
4
2
–2
–4 Z
TFrom the origin, move 1 unit right, and 3 units down.
9-3 The Coordinate Plane
Check It Out: Example 3
Graph each point on a coordinate plane.
A. L(3, 4)
B. M(–3, –3)x
y
–4 –2 0 2 4
4
2
–2
–4
From the origin, move 3 units right, and 4 units up.
L
M
From the origin, move 3 units left, and 3 units down.
9-3 The Coordinate Plane
Check It Out: Example 3C
Graph each point on a coordinate plane.
C. P(1, –2)
D. G(–4, –2)
From the origin, move 1 unit right and 2 units down.
x
y
–4 –2 0 2 4
4
2
–2
–4
PGFrom the origin, move 4 units left, and 2 units down.