John Is Trying to Decide How to Divide His Time

question 22

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: $$\begin{array} { | l | l | } \hline \begin{array} { l } \text { Cleaning time } \\\text { (hr/day) }\end{array} & \begin{array} { l } \text { Total numbers of } \\\text { windows cleaned }\end{array} \\\hline 0 & 0 \\\hline 1 & 7 \\\hline 2 & 11 \\\hline 3 & 14 \\\hline 4 & 16 \\\hline 5 & 17 \\\hline\end{array}$$
A second hour cleaning windows will yield additional earnings of _________.

• A)$2
• B)$14
• C)$8
• D)$7

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Definitions:

Direction of the Relationship

Refers to the way two variables relate to each other in a study, indicating whether an increase or decrease in one variable results in an increase or decrease in the other.

Correlation Coefficient

A numerical indicator that shows how much two or more variables move in unison.

Descriptive Research

A type of research that aims to observe, describe, and document aspects of a situation as it naturally occurs.

Research Methods

Systematic strategies, techniques, and approaches used to conduct scientific investigations and gather empirical data.