Find below regression output for a demand equation where "p" is own price, "pc" is the price of a compliment, and "ps" is the price of a substitute and "I" is income.
a) Which variables are statistically different fro zero? Why?
b) How about the overall goodness of fix?
c) Write the basic demand equation when, "pc=60", "ps=$2.00" and I=37
d) How does this equation written in part c above relate to basic demand theory?