A period on the periodic table is a horizontal row. The atoms in this row show a trend in their width, and in the amount of work needed to make them an ion, among the fe â¦ w other similarities.
The x-axis and y-axis Remembered! The x-axis and y-axis are two lines that create the coordinate plane. The x-axis is a horizontal line and the y-axis is a vertical line. I'm sure you've heard that a million times, but it might hard for you to remember which one is which. Here is a little trick to help you remember...
x-and y-Intercepts. The graphical concept of x-and y-intercepts is pretty simple. The x-intercepts are where the graph crosses the x-axis, and the y-intercepts are where the graph crosses the y-axis. The problems start when we try to deal with intercepts algebraically.To clarify the algebraic part, think again about the axes.ake a closer look, and you'll see that the y-axis is also the line  x = 0. In the same way, the x-axis is also the line  y = 0. Then, algebraically, 1  an x-intercept is a point on the graph where y is zero, and. 2  a y-intercept is a point on the graph where x is zero.