**Definition of Coordinates**

- In a two-dimensional coordinate plane, Coordinates are the pairs of numbers which specify the position or location of a point or of an object.

**More about Coordinates**

- Coordinates are represented by putting the ordered pairs in parentheses. For example: (
*x*,*y*). *X-*coordinate is the first number in an ordered pair and represents the horizontal position of an object in the coordinate plane.*Y-*coordinate is the second number in an ordered pair and represents the vertical position of an object in the coordinate plane.

**Example of Coordinates**

- The point P is eight units to the left of the
*Y*-axis (negative direction) and is eight units below the*X*-axis (negative direction). So the coordinates of point P is (- 8, - 8).

**Solved Example on Coordinates**

Identify the coordinates of the point C from the graph.

Choices:

A. (- 5, 1)

B. (5, - 1)

C. (- 1, - 5)

D. (- 5, - 1)

Correct Answer: D

Solution:

Step 1:Start at the origin.

Step 2:The point C is 5 units to the left of theY-axis.

Step 3:So, theX-coordinate of point C is - 5.

Step 4:Point C is 1 unit below theX-axis.

Step 5:So, theY-coordinate of point C is - 1.

Step 6:The coordinates of the point C are (- 5, - 1).

**Related Terms for Coordinates**

- Coordinate plane
- Horizontal Axis
- Number
- Ordered Pair
- Ordinates
- Origin
- Pair
- Point
- Vertical