I've been reading up on functions and I'm not sure I quite understand it all. From what I understand if you have a function f(x)=x^2 then if you input x as 2 the output, y, or codomain will be 4. The domain is the input. Now in order to graph this function you simply input a bunc h of numbers such as 2, 4, 6, 8, and 10 and the output or range will be 4, 16, 36, 64, and 100. If we graph these numbers we can find the derivative or slope of the function. Is all of this correct?