equilibrium price and quantity

What would cause an increase in quantity supplied?

Consider the market for wine in the diagram below: 70 Price ($) 60 50 40 30 20 10 S D 100 200 300 400 500 600 700 800 Wine (millions of bottles) $45 and 550 million bottles of wine $45 and 500 million bottles of wine $50 and 600 million bottles of wine $50 and 500 million bottles of wine Suppose supply shifts to the right by 100 million bottles of wine. What would be the new equilibrium price and quantity of wine as a result of this increase in supply?

I can seem to figure out the last two questions I bolded: Why does the demand curve slope downward?  Why does the supply curve slope upward? Given the demand and supply schedules below:   Price (dollars per CD) Quantity Demanded (per day) Quantity Supplied (per day) 5.00 300 100 6.00 250 150 7.00 200 200 8.00 150 250 9.00 100 300   What is the market equilibrium?   If the price of CD is $6.00, describe the situation in the CD market. Explain how market equilibrium is restored.   A rise in incomes increases the quantity of CDs demanded by 100 a day at each price. What is the new equilibrium and how does the market adjust?   A rise in the number of recording studios increases the quantity of CDs supplied by 75 a day at each price. People download more music from the Internet and the quantity demanded of CDs decreases by 25 a day at each price. With no change in incomes, what is the new equilibrium and how does the market adjust?