Using a calculator or computer, sketch the graph of y : 26X + 381' for 3 g x g 3, 0 g y g 20. Observe that it looks like the graph of y : coshx. Approximately where is its minimum? Minimum at x : Show algebraically that y = 26'\" + 36\" can be written in the form )2 : Acosh(x c). Calculate the values of A and c. A : C : ( Think what this tells you about the graph you obtained!)