Or if you really want to impress your colleagues at meetings or cocktail parties, pretty much every y by x type graph in JMP enables the JMP cross hair tool. So the technique to show off JMP's dynamic graphing capability is to invoke the cross hair tool, then click hold and slide horizontally along the x axis to your desired x value, then slide vertically in the y direction until the cross hair is at the interval limit and read off the pop up values for x and y. Then ask..."Anybody wanna try that in Excel?"