Economics: Principles, Problems, & Policies (McGraw-Hill Series in Economics) - Standalone book
Economics: Principles, Problems, & Policies (McGraw-Hill Series in Economics) - Standalone book
20th Edition
ISBN: 9780078021756
Author: McConnell, Campbell R.; Brue, Stanley L.; Flynn Dr., Sean Masaki
Publisher: McGraw-Hill Education
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Chapter 1.A, Problem 5AP
To determine

Construct the equation and predict the savings.

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Suppose that when the interest rate on loans is 16 percent, businesses find it unprofitable to invest in machinery and equipment. However, when the interest rate is 14 percent, $5 billion worth of investment is profitable. At 12 percent interest, a total of $10 billion of investment is profitable. Similarly, total investment increases by $5 billion for each successive 2-percentagepoint decline in the interest rate. Describe the relevant relationship between the interest rate and investment in a table, on a graph, and as an equation. Put the interest rate on the vertical axis and investment on the horizontal axis. In your equation use the form i = a + bI, where i is the interest rate, a is the vertical intercept, b is the slope of the line (which is negative),and I is the level of investment.
The relationships between some economic variables w, y, and z and another economic variable, x, are shown in the graph above. Notice that the horizontal axis is labeled “x” since they are all functions of x but the vertical axis is not labeled. 1-1 Does the vertical axis need a label in order for you to be able to understand the graph?1-2What value of x minimizes w?
Sketch a graph to illustrate your idea of each of the following relationships. Be sure to label both axes appropriately. In each case, explain under what circumstances, if any, the curve could shift: The relationship between a person’s age and height   Average monthly temperature over the course of a year A person’s income and the number of hamburgers consumed per month The amount of fertilizer added to an acre of land and the amount of corn grown on that land in one growing season An automobile's horsepower and it's gasoline mileage (in miles per gallon)
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