Write the theoretical demand equation using the appropriate variable names you created when you prepared data for analysis. The variable names should be very short and must be in capital letters. For instance, QTY for Y, PRPIZZA for X1, PRSDRK for X2. Note that if you used QTY for quantity, use QTY in the estimating demand equation rather than Y. Remember to use the exact same variable names you used in the data. In other word, do NOT use Y and X1, X2, X3, and so on, as done in the textbook. I am trying to teach you a proper way of teaching you how to prepare a technical paper.