Final answer:
An axis in mathematics is derived from either end of a line, while the derived median line comes from the line's middle, useful in geometric figures like ellipses and data representation in graphs.
Step-by-step explanation:
An axis is derived from the either end of the line, while the derived median line is derived from the middle of the line.
This concept can be seen in various mathematical contexts, such as the major and minor axes of an ellipse, where the semi-major axis is half the major axis, and the semi-minor axis is half the minor axis.
It can also be relevant in displaying data on a graph, where axes are used to compare different sets of data, like the relationships between length and median weight for American baby boys and girls over the first three years of life.