about the getting functions

[md2]

about the highest and lowest of function, if we get the lowest value of function like sinus and cosinus ( exmaple ) , od minus them we get the medium of function, but the doing it on back, we maybe get the lowest and hightest of this function

and if we get y = 2x + 1, and change it to 2x - 1, we can do 2x + 1 / 2x - 1, and dont know if it will make something

Edited June 3, 2014 by md2

[imatfaal]

Youre not making enough sense to allow other members to answer your question. Please rephrase