12 4, 10 10 8,8 16,6 24,4 30,2 10 15 20 25 30 35 Price (Dollars)

1. The graph below shows the demand curve of two goods by an individual, use the information in the graph to answer the questions that follows; Price GH¢30.00 A GH¢25.00| C D1 D2 2000 2500 3000 Quantity (gallons per day) (a) Calculate the price elasticity of demand for the demand curve, D1, from point A to point C, and the price elasticity of demand for D2 from point A to point B. which demand curve is more elastic, Di or D2? Briefly explain your answer. (b) Given the expenditure function as e(p.q)=pg where p is the price and q is quantity demand. Suppose the individual was purchasing 2000 gallons per day at a price of GH¢30.00 per gallon and the price is cut to GH¢25.00 per gallon. calculate the | change in total expenditure if the demand curve of the individual is D1? What will be the change in total expenditure if demand is D2? 2. Discuss any four factors that would cause an increase in demand of petroleum engineering program in Ghanaian universities.

Use the graph for Yolanda's Frozen Yogurt Stand to answer the questions that follow Use the midpoint formula to calculate the price elasticity of demand for D, between point A and point C and the price elasticity of demand for Dy between point A and point Price elasticity of demand for D- (Enter your response rounded to two decimal places Be sure to include the mus sign (BUID JA AMIN) POL 4.00 3.15- 330 335 300 275 250 225 200 UN 1304 125 1.00 17H 650 she 100 Quanty (on per day) Di

1. From the data in Table 5.5 about demand for smart phones, calculate the price elasticity of demand from: point B to point C, point D to point E, and point G to point H. Classify the elasticity at each point as elastic, inelastic, or unit elastic. Points P A 60 3,000 B 70 2,800 C 80 2,600 D 90 2,400 100 2,200 110 2,000 120 1,800 130 1,600 Table 5.5

4-6 Suppose that the price of croissants rises from $2 to $3 per unit. Use the mid-point approach to get the elasticity. answer the following The quantity of orange juice purchased falls from 10 million bottles to 5 million bottles. What is the cross-price elasticity of demand between croissants and orange juice? Are they complements or substitutes? The quantity of jelly purchased increases from 10 million jars to 20 million jars. What is What is the cross-price elasticity of demand between croissants and jelly? Are they complements or substitutes?

4. Derive the ordinary demand curve. Calculate the own-price and cross price elasticities for U = 3x + 2y at Px = 2, Py= 1 and m = 12. Graph the Demand curve.

3. A demand equation for rice is Quantity = 100 - 10(Price) + 5(Income). Show your calculations in responding to these questions. a) What is the quantity when P-10 and Income 20? b) What is the price elasticity of demand when the Price is 10 and the Income is 20? c) What is the income elasticity of demand at this price and quantity? %3D

2. Imagine that you run a small bakery. In March the price of a cupcake was $2, and you sold 50 per day. In April you increased the price of cupcakes to $3 and you sold 40 per day. 1. Did your revenue increase or decrease? 2. What was the price elasticity of demand to Cupcakes when price increased from $2 to $3. 3. Do you think demand was elastic or inelastic prior to the change in prices

Use the graph to answer the question that follows. What is the price elasticity of demand when price increases from $2 to $4? A-0.2 B-0.5 C-2 D-3 E-5

1. Calculate the Price elasticity of demand, & for the following examples: a) Demand is given by Q = 50 – P at the price of $10. b) Demand is given by Q= 100 - P, at the price of $50. %3D c) Demand is given by Q= 25 - .25P, at the price of $40. d) Demand is given by Q = 20 - .1P, at the price of $80. e) Demand is given by Q = 60 – 1/3P, at the price of $60.