## Intermediate Algebra (6th Edition)

$f(x)=x+7$
We are given that $y=x+7$, which is an example of a relation between the variables x and y. However, to note that y is a function of x, we can rewrite this as $y=f(x)=x+7$. This function notation, read as "f of x," tells us that y is a function of x (or that y depends on x).