In this lesson, you practiced plotting ordered pairs of rational numbers on a 2-dimensional coordinate plane. This is an extension of what you did in a previous lesson in this course where you placed fractions and decimals on a 1-dimensional number line. In fact, you may think of a Cartesian coordinate plane as an intersection of two number lines, where each number line represents an axis and the intersection of the two number lines is called the origin.
The two axes – the x-axis and the y-axis – also create four quadrants in the coordinate plane. When you are plotting or locating points be mindful of which of the four quadrants the points will appear.