Functions! is a graphing application that is plotting functions. It is allowing you to zoom and shift the graph to get it to the size and position you need.
Enter the function as you have it on paper with natural exponents (no ^s).
Functions! is not only plotting your function, it is also telling you the y-Intercept, the first, second and third derivation and the antiderivative (just for polynomial functions).
This app is for free and contains ads to support the developer, which can be deactivated without cost.