1 Jaw pain and Nausea and Abdominal symptoms (5 causes) 2  Jaw pain and Nausea and Digestive symptoms (5 causes) 3  Jaw pain and Nausea and Face symptoms (5 causes)  Jaw pain and Nausea and Head symptoms (5 causes)
Definition of X-Axis. The coordinate plane is formed by the intersection of two number lines, a horizontal number line and a vertical number line. The horizontal number line is called the x-axis.
In x-y plots, like the one above, the x-axis runs horizontally (flat). Typically, the x-axis has numbers representing different time periods or names of things being measured. In this plot, the x-axis measures the amount of money spent by a country on elementary and secondary education per child.