Your age is a linear function (of time).
Rational function can be used in real life in modeling multi-person work problems.
If you are asking about periodic function in the real world, than there are millions of examples. The first one that comes to mind are the sin and cos functions. These are used in almost every field of science.
Unless you are an electrical engineer or a math teacher, every number you will ever use in a real world situation will be a real number.
The diagonal of a unit square, for example, is radical(2).
what is the study of the design, form and function of objects in the real world
Your age is a linear function (of time).
The basic idea is to represent the relationship between two variables as a function. Many problems in physics, chemistry, etc. use common functions (such as the square function, the square root function, the exponential function), or more complicated functions.
Rational function can be used in real life in modeling multi-person work problems.
the number of students depnds upon the classroom
If you are asking about periodic function in the real world, than there are millions of examples. The first one that comes to mind are the sin and cos functions. These are used in almost every field of science.
Unless you are an electrical engineer or a math teacher, every number you will ever use in a real world situation will be a real number.
You cannot. The function f(x) = x2 + 1 has no real zeros. But it does have a minimum.
A real world example of a cubic function might be the change in volume of a cube or sphere, depending on the change in the dimensions of a side or radius, respectively.
Well, since there is no such thing as a sphare in the real world, it is a bit hard to tell what it can or cannot use.
use a absolute value to represent a negative number in the real world
The diagonal of a unit square, for example, is radical(2).