The phrase "first quadrant" refers to a specific section of a graph or coordinate system. It is the top right portion of the graph where both the x-axis and y-axis are positive numbers. Full definition
The two leaders plan to walk the 35 - block route Sunday with two youth dance troupes and several hundred others in the first quadrant of the march, sources said. (nypost.com)
It is located in the first quadrant of the northern hemisphere (NQ1) and can be seen at latitudes between +90 ° and -65 °. (constellation-guide.com)
Great for reinforcing coordinates in the first quadrant. (tes.com)