John Is Trying to Decide How to Divide His Time

question 67

Multiple Choice

John is trying to decide how to divide his time between his job as a stocker in the local grocery store,which pays $7 per hour for as many hours as he chooses to work,and cleaning windows for the businesses downtown.He makes $2 for every window he cleans.John is indifferent between the two tasks,and the number of windows he can clean depends on how many hours he spends cleaning in a day,as shown in the table below: $$\begin{array} { | l | l | } \hline \begin{array} { l } \text { Cleaning time } \\\text { (hr/day) }\end{array} & \begin{array} { l } \text { Total numbers of } \\\text { windows cleaned }\end{array} \\\hline 0 & 0 \\\hline 1 & 7 \\\hline 2 & 11 \\\hline 3 & 14 \\\hline 4 & 16 \\\hline 5 & 17 \\\hline\end{array}$$
Refer to the information above.If we plot John's opportunity cost per window on the vertical axis and the number of windows cleaned each day on the horizontal axis,we will have John's _______ curve for window-cleaning services.

• A) production possibilities
• B) supply
• C) benefit
• D) demand

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Definitions:

Science Goal

The objective or aim of a scientific endeavor, intended to advance knowledge or solve a specific problem.

Extraneous Variable

Denotes any variable other than the independent variable that might cause unwanted changes in the outcome of an experiment.

Independent Variable

The variable that is manipulated or changed in an experiment to test its effects on the dependent variable.

Dependent Variable

In an experiment, the variable that is measured or tested and is expected to change as a result of manipulations to the independent variable.