FUNCTION

                                                            
Our math teachers introduce their student to functions , They typically bring the concept to life through the idea of function. But function will really begins to come in our life. 
As a student, I find the uses of the function in real word.
The function has an input and output as a student. We easily grasp the idea of a function input "goes in" while the output "comes out".
For example, We have a machine. Can we say that what's going on inside the machine? if we know the rule of the machine and the input, We can predict the output and if we know the rules and an output, We can determine the input. We can also imagine that the machine asking "what's my rule?" If we examine the inputs and outputs, We should be able to figure out the mystery of a function rule.
In out daily life we can also use function, it is because of input and output. 
As a student i can apply input in hardwork of my studies and if i will not fail in my studies i can proceed to the next grade level. And the output there is my achievement or the certificate i can get when i graduted Senior High.