Grids have two axes. The horizontal axis is called the x-axis and the vertical axis is called the y-axis. Coordinates are always written like this (2, 3). The first number is the point's position ...

In this example, the chart displays the number of airplanes (y-axis) that have flown overhead on each day (x-axis) of a given week. It's easy to see which day had the most activity. You can still ...