Question

Which of the following is the most appropriate unit to describe the rate at which a person reads?

A. Minutes per word, because the independent quantity is the minutes
B. Minutes per word, because the independent quantity is the words
C. Words per minute, because the independent quantity is the minutes
D. Words per minute, because the independent quantity is the words

Answer 1

C. Words per minute, because the independent quantity is the minutes.

Explanation:

The speed will be measured in words per minute as the number of words a person can read in a minute are counted.

The independent quantities are those quantities which are controlled during the measurement while the dependent quantities change depending on the independent quantities. While measuring the reading speed of a person minute is controlled while the number of words are counted in a minute. So minute is the independent quantity.