8/29/14 Week 2 What is a function

A function can be express as f(x)=...... It simply involved one or more variables in just one equation. F(x) in a function can be replaced by y which come out to be y=.......  Also f(x) and set to be equal to y as f(x)=y which in here we make distinction among variable by calling x is the input and y is the output to the function. X can also be called as the independent variable and y as the dependent variable. The value of x has direct affect on the y result. In conclusion, a function can be interpreted as a relationship between variable values, such as x and y.