Which of the following (A or B) would graphically show an increase in supply?

How do you show a decrease in demand graphically? What happens to equilibrium price and quantity?

The following table shows the annual demand and supply in the market for shoes in Miami. Price (Dollars per pair of shoes) 20 40 60 80 PRICE (Dollars per pair of shoes) 120 100 20 On the following graph, plot the demand for shoes using the blue point (circle symbol). Next, plot the supply of shoes using the orange point (square symbol). Finally, use the black point (plus symbol) to indicate the equilibrium price and quantity in the market for shoes. Note: Plot your points in the order in which you would like them connected. Line segments will connect the points automatically. 0 100 0 Quantity Demanded (Pairs of shoes) 1,100 900 800 200 600 500 400 600 800 QUANTITY (Pairs of shoes) Quantity Supplied (Pairs of shoes) 200 400 500 900 1000 1,200 1200 O Demand Supply Equilibrium

Explain the difference between a movement along demand and supply curves and a shift of demand and supply curves. What can be cause the above situation? Provide an example for each.