Question

In three to five sentences write the significance of the real life situation.

Answer 1

Almost everything most people think of as math involves a function. In fact, if math is used for any real life purpose you can be sure at least one function is used.

Addition is a function that maps two real numbers to one real number.

A metric is a function that maps two points in a space to a non-negative real number and represents the distance between the two points.

There are the trig functions (sin, cos, tan, etc,) which map angles to real numbers.