Using the following intervals for the scores on a 30-point quiz, how many x's would fall over the interval of 19-21 on a line plot?

Scores: 21, 27, 20, 29, 23, 21, 21, 27, 26, 25

Intervals: 19-21, 22-24, 25-27, and 28-30

A.1

B.4