The mistake that Andy made on the line plot is that he did not graph 3 3 / 4.
<h3>What is a line plot?</h3>
A line plot is a graph that shows the frequency, or the number of times, a value occurs in a data set.
A line plot can also be called a dot plot.
According to the line plot, he graphed the whole length in inches except for the length 3 3 / 4 inches, using x to represent the number of times they occur.
Therefore, Andy made a mistake by not graphing 3 3 / 4 inches .
learn more on line plot here: brainly.com/question/15833128
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