Question

What is the $z$-axis?

Answer 1

In this problem, we have to find the $z$-axis. We should know that, $z$-axis is the axis on the graph at least three dimensions that is usually drawn vertically and usually shows the range of values of a variable dependent on two other variables or the third independent variable. We can now see in brief about the $z$-axis.

Complete step-by-step solution:
We should know that a standard graph is like a 2D square. The length of the square is the x-axis and the height of the square is the y-axis and we can use these to plot two variables against each other (example Foot size and leg size).
Now we can analyse that, if we want to plot three variables against each other, then we can make 3D graphs such as cubes and cuboids. As before the length and the height are the x and y-axes, but the third dimension, the depth is called the $z$-axis.
We can now see how a $z$-axis will look like with the x-and y-axis.

Note: Students should understand the importance of $z$-axis as it is used in 3D representations. We should also remember that, if we want to plot three variables against each other, then we can make 3D graphs such as cubes and cuboids. As before the length and the height are the x and y-axes, but the third dimension, the depth is called the $z$-axis.