Which line plot displays a data set with an outlier?
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The first one. An outlier doesn’t belong is the data. The first one has that 23 that doesn’t belong

First, we will need to find the total amount of ninth graders. Which is 80. And how many did attend? 60.

So, we can represent it as a fraction. 

Now convert the fraction into a decimal number. Divide the top by the bottom.

60 ÷ 80 = 0.75

Now move the decimal points two places to the right and tack on a % sign.

0.75 = 75%

So, 75% attended the football game.