The demand curve for haircuts at Terry Bernard's Hair Design is:
P=20-0.20Q
Where Q is the number of cuts per week and P is the price of a hair cut. Terry is considering raising her price above the current price of $15. Terry is unwilling to raise price if the price hike will cause revenues to fall.
a) Should Terry raise the price of haircuts above $15? Why or why not?
b) Suppose demand for Terry's haircuts increases to P=40-0.40Q. At a price of $15, should Terry raise the price of her haircuts? Why or why not?
Please explain how?
P=20-0.20Q
Q=100-5P (where does the 100 come from?) Please help me reslove this problem.