# What Are the Four Quadrants on a Graph? ••• marekuliasz/iStock/GettyImages

A scatter-plot graph is divided into four quadrants due to the (0, 0) intersection point of the horizontal axis (x-axis) and vertical axis (y-axis). This intersection point is called the origin. Both axes extend from negative infinity to positive infinity, resulting in four possible combinations of (x, y) points in the four respective quadrants. You should use Roman numerals to label your quadrants.

The upper-right quadrant, also referred to as the Quadrant I, will only contain points that lie within the range of 0 to positive infinity for both the x and y axis. Therefore, any point, indicated as (x, y), in the first quadrant will be positive at both x and y. So the product of the coordinates [ (+) x, (+) y] will be positive.

The upper-left quadrant, or Quadrant II, identifies only points to the left of zero (negative) on the x-axis and points above zero (positive) on the y-axis. Thus, any point in the second quadrant will be negative at the x value and positive at the y value. The product of these coordinates, [ (-) x, (+) y ], is negative.