Written Response 1 . In a photoelectric experiment similar to Millikan's experiment, a student obtained the following data ( / 4): frequency of EMR Ex of electrons ( x 1014 Hz) ( X 10-19 J) 6.20 2.91 5.30 2.32 4.20 1.58 3.50 1.12 2.90 0.736 Using a graph of this data, determine the following: A. the threshold frequency B. the work function C. Planck's constant * hint - use a graphing calculator. show your work by indicating the linear regression formula (y = mx + b) and indicating how each value can b determine from it. threshold freq. : work function : Planck's constant