I'm looking at an exponential regression graph that I've made. My book says press 2nd/Calc/Value and enter a number to move to graph to that point. Whenever I enter the number it takes me to the home screen and asks as though I exited the graph and were entering a number. Basically, I want to be able to switch the cursor to a different point on the graph (not manually because then I can't get the proportions exact).