The Cost of a Long-Distance Phone Call Is $0

question 136

Short Answer

The cost of a long-distance phone call is $0.39 for the first minute and $0.28 for each additional minute. If the total charge for a long-distance call is $4.03, how many minutes was the call? __________ minutes

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Definitions:

Independent Variable

The variable in an experiment that is manipulated to observe its effect on the dependent variable.

Dependent Variable

The variable in experimental research that is measured to assess any changes in response to the manipulation of the independent variable.

Random Assignment

A method used in experiments where participants are allocated to various groups in a way that ensures each has an equal chance of being chosen, to ensure fairness and objectivity in the results.

Experimental Conditions

The controlled environments and variables manipulated by researchers to investigate causal relationships in a study.