# Equilbrium values for given linear demand/supply curves

The following relations describe monthly demand and supply for a computer support service catering to small businesses:

Qd=3,000 -10 P

Qs=-1,000+ 10P

where Q is the number of businesses that need services and P is the monthly fee, in dollars.

a) At what average monthly fee would demand equal zero?

b) At what average monthly fee would supply equal zero?

c) Plot the supply and demand curves.

D) What is the equilibrium price/output level?

e) Suppose demand increases and leads to a new demand curve:

Qd=3,500 - 10P

what is the effect on supply? What are the new equilibrium P and Q?

f) Suppose new suppliers enter the market due to the increase in demand so the new supply curve is Q= -500 + 10P. What are the new equilibrium price and equilibrium quantity?

G) Show these changes on the graph.

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#### Solution Summary

Solution describes step by step process for determining equilbrium prices and quantities for a computer support business. It also explains mathematical approach to study the changes in demand/supply functions on equilbrium values. Soltions are attached in word document. Graphs are made to illustrate effect of changes in demand/supply functions on equilbrium positions.