Hello and welcome friends!
Welcome to another exciting Math lesson! Today we will learn about Functions. Functions form one of the most basic concepts in mathematics and in modeling real world problem. They are used to study relationships between quantities, to understand time-dependent phenomena like motion of objects, electric current fluctuations, temperature changes in our atmosphere among many other things.
Functions work almost like an input-output mechanism where the function works on a variable to produce a function value.
Let us start with the most basic mathematical definitions in this topic.