Many users were left aghast when, for the first time ever, Spotify announced they are raising subscription prices. The Premium Family Plan is rising from $14.99 to $15.99 a month. Source: techradar.com, May 2, 2021 Assume that the marginal social cost of streaming is zero. (This assumption means that the cost of operating a streaming service doesn't change if more people stream more songs.) Also assume the market demand is linear. (1) Draw a graph of the market for streaming music with a price of $15 a month. On your graph, show consumer surplus and producer surplus. (2) With a price of $15 a month, is the market efficient or inefficient? If it is inefficient, show the deadweight loss on your graph. (upload your graph)

Table 3.9 illustrates the markets demand and supply for cheddar cheese. Graph the data and find the equilibrium. Next, create a table showing the change in quantity demanded or quantity supplied, and a graph of the new equilibrium, in each of the following situations: The price of milk, a key input for cheese production, rises, so that the supply decreases by 80 pounds at every price. A new study says that eating cheese is good for your health, so that demand increases by 20 at every price.

A friend of yours is considering two cell phone service providers. Provider A charges 120 per month for the service regardless of the number of phone calls made. Provider B does not have a fixed service fee but instead charges 1 per minute for calls. Your friend's monthly demand for minutes of calling is given by the equation QD = 150 50P, where P is the price of a minute. a. With each provider, what is the cost to your friend of an extra minute on the phone? b. In light of your answer to (a), how many minutes with each provider would your friend talk on the phone? c. How much would she end up paying each provider every month? d. How much consumer surplus would she obtain with each provider? (Hint: Graph the demand curve and recall the formula for the area of a triangle.) e. Which provider would you recommend that your friend choose? Why?

The following table summarizes information about the market for principles of economics textbooks: What is the market equilibrium price and quantity of textbooks? To quell outrage over tuition increases, the college places a $55 limit on the price of textbooks. How many textbooks will be sold now? While the price limit is still in effect, automated publishing increases the efficiency of textbook production. Show graphically the likely effect of this innovation on the market price and quantity.

Why is a production possibilities frontier typically drawn as a curve, rather than a straight line?