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The following table contains information about the income (Y) and consumption (C) levels of the representative household –
With the help of the data given in the above table, the following scatter plot that shows a relation between C&Y has been drawn in Excel –
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- For the relationship graphed below: Household Spending = C ($/month) a Question 7 Homework Unanswered b с d 3,200 2,300 1,400 500 0 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. 1,000 2,000 3,000 Total Income = Y($/month) Spending Function total income is the independent variable and household spending is the dependent variable. total income is the dependent variable and household spending is the independent variable. total income is unrelated to household spending. total income is an exogenous variable, or shift factor.4G 34 |1 6:33 ... Unit 1 Introduction Picture - Saved Class Exercise No 1 • Given the following data in the table:- 1- Draw the curve where Y is vertical axis and X is horizontal axis 2- Find the slope between point B and Y X 1 42 2 30 3 18 4 12 Points A В D 17 Notes Comments Class Exercise No 1 References References a gy M a tan r la * Given the followine data in the table - Draw the curve where Yis vertical axis and Xb horizontal ws 2- Find the slope between point Band C u oanan n , s saa o v aw , g a w -4 Points Y ww anjt A 1 42 w. n B 2 30 3 18 Principias ofccecanomica a , C Ma O t hte in D 4 12 17 18 19Part C 3. The manager of a certain gasoline station wants to forecast the demand for the unleaded gasoline next month so that the proper number of gallons can be ordered from the distributor. The manager has accumulated the following data demand for unleaded gasoline from sales during the past eight months. Month Gasoline Demanded (gallons) Mar 900 Given that the forecast for March is 920. Apr 755 May 650 Jun 550 Jul 625 Aug 730 Sept 820 Oct 1 100 a. Compute the exponential smoothed forecast for the demand from April to November. Use a = 0.25. b. Compute the exponential smoothed forecast for the demand from April to November. Use a = 0.45. c. Plot the actual demand and the forecasts determined in part a and b on the same graph and compare them. d. Make a comparative analysis out of your answers in the plotted data. (3-5 sentences)
- 7. Dependent & independent variables; positive & inverse relationships: Ypsilanti Market Research conducted a survey to find out whether people who earn more money purchase more expensive goods. The following table indicates the relationship between income the survey subjects earned and the price of the car that they purchased. Price Income (Thousands of dollars per car) (Thousands of dollars per year) 0. 10 20 15 40 20 60 25 80 30 100 In the diagram below, draw the graph corresponding to the above table.Refer to the figure below. According to this graph, the relationship between hours of study time and points on the exam is as follows: The relationship is first positive and then it turns negative. Positive but diminishing. Positive and increasing. a. b. C. d. Negative. Nonexistent. е. 10 8 9 0 12 Study time (hours) + vi 6:59 9 (WE2 UO SUIod) apEunCH SESSION 1.2: SELF-ASSESSMENT EXERCISE 1. Briefly explain the use of graphs as a way to represent economic relationships. What is an inverse relationship? How does it graph? What is direct relationship? How does it graph? 2. Graph each of the following sets of numbers in table 2 below. Draw a line through the points and calculate the slope of each line. 2X4 1 2 3 1 Y 5 10 20 X 0 5 20 2 Y 0 5 10 20 X 1 2 3 3 Y 25 20 15 X 0.1 0.3 Y 100 75 50 25 Table 2 3. For each of the graphs in table 2 above, determine whether the curve has a positive or a negative slope. Give an intuitive explanation for what is happening with the slope of each curve. ICON 1000 Principles of Economics I- UNIT 1 11
- 26. Describe the consumption pattern of the consumer based on the table below unit MU/P MU/P (sundae) fries 8 1st 2nd 17 5 3rd 1A B C E K L M N A common perception is that airline profits are strongly correlated with the price of oil. The Following are annual net incomes of American Airlines together with the approximate price of oil in the period 2005-2010: 3 a. Populate the table American Net Income (S million) (y) Barrel Oil ($) Year ху (x) 4. 5. 1 2005 56 -850 6 2006 63 250 7. 3 2007 67 450 8. 4 2008 92 -2100 2009 54 -1450 10 6. 2010 71 -700 11 12 13 14 b. What is Ex? 15 16 c. What is Ey 17 18 d. What is n? 19 20 e. What is Exy 21 22 £. What is (Ex²) 23 24 g. What is (Ex) 25 26 h. Obtain a regression line (obtain the coefficients) showing American's net income as a function of the price of oil 27 28 29 30 31 32 i. Obtain the coefficient of correlation r 33 34 35 Use the data analysis tool in Excel to obtain the coefficients in part 1(h). Copy and Paste your regression output 37 below. 36 38 39Savings (thousand) Consumption (thousands) 6 Panel A Consumption Move this point along C C Y=C+S O Macmillan Learning Adjust the interactive graph in order to observe the relationship between income, consumption, and saving changes as income increases. Use the graph to help you answer the following questions. 2 3 4 5 6 Panel Bincome (thousands) Savings 4 5 6 S Income (thousands) a. At an income of 4000, how much is consumed? How much is saved? Consumption = $ -500 Savings = $3500 O Consumption = $0 Savings $4000 = Consumption = $ 3500 Savings = $-500 O Consumption = $4000 Savings = $0
- Which of the following pairs is most likely to exhibit an inverse relationship?a. The amount of time you study and your grade point averageb. People’s annual income and their expenditure on personal computersc. Baseball players’ salaries and their batting averagesd. The price of a concert and the number of tickets that people purchaseBriefly explain the use of graphs as a way to represent economic relationships. What is an inverse relationship? How does it graph? What is a direct relationship? How does it graph? Graph and explain the relationships you would expect to find between ( a ) the number of inches of rainfall per month and the sale of umbrellas, ( b) the amount of tuition and the level of enrollment at a university, and (c ) the popularity of an entertainer and the price of her concert tickets. In each case cite and explain how variables other than those specififi cally mentioned might upset the expected relationship. Is your graph in previous part b consistent with the fact that, historically, enrollments and tuition have both increased? If not, explain any difference.The following graph contains four lines (A, B, C and D), each of which has a slope that is either positive, negative, zero, or infinite. Y-axisX-axisBDCA For each of the following scenarios, indicate whether the relationship between the two variables is positive or negative, as well as which line on the previous graph has a slope that reflects this type of relationship. Hint: The X-axis and Y-axis on the graph are not labeled intentionally. You need to substitute the variables from each scenario for the horizontal and vertical axis. For example, in the first scenario, X-axis should be labeled “ ice-cream" and Y-axis should be labeled "The temperature". Scenario Relationship Line As the temperature rises, the demand for ice-cream rises. Negative As the temperature rises, the demand for hot cocoa falls. Positive As the temperature falls, the demand for popsicles falls. Negative True or False: Line B has a slope of infinity.…