# Coordinates

• Coordinates are points on a graph represented by an ordered pair (x,y).
• They show a specific location on a two-dimensional grid.
• The first number in the pair, corresponding to the x-axis, is called the abscissa.
• The second number in the pair, corresponding to the y-axis, is called the ordinate.
• If a graph is divided into four quadrants by the x and y axes, the location of a point can be determined by the sign of the coordinates in each quadrant. Quadrants are numbered anti-clockwise from the upper right quadrant which is Quadrant 1.
• In Quadrant 1, both coordinates (x, y) are positive.
• In Quadrant 2, the x-coordinate is negative, while the y-coordinate is positive.
• In Quadrant 3, both the coordinates (x, y) are negative.
• In Quadrant 4, the x-coordinate is positive, while the y-coordinate is negative.
• The origin, represented by the point (0,0), is the central point where both the x-axis and y-axis meet.
• By understanding coordinates, you can plot any point on a graph.
• They can also help you understand the relationship between two variables in a linear or non-linear equation.