What is the order, from narrowest to widest graph, of the quadratic functions f(x) = –10x², f(x) = 2x², f(x) = 0.5x²?

The narrowest to widest graph is in the order given. 

The red graph: f(x) = 10x^2
The blue graph: f(x) = 2x^2
The green graph: f(x) = 0.5 x^2

The first graph has been changed to f(x) = 10x^2 instead of f(x) = - 10x^2 because it will show how narrow the graph is rather than whether it is right side up or upside down which doesn't matter.

answer: they are written from narrowest to widest.