A catenary curve can be described by the following function: y= a/2 (ex/a + e -x/a) where a is a non-zero constant By selecting sutable axes, devise an equation that will produce the gateway arch. Right next to the question is a graph of an arch that is 630 feet high (on the y axis) and 630 feet long (on the x axis). I have no idea where to start. I was thinking that I could substitute the x and y values in of 630 to find the a value and thus the normal function (since its constant). But then why not just ask for that? Why go and say devise an equation, i dont follow. Please, I would really appreciate someone getting me started on this!