Answer:
A: 12
Step-by-step explanation:
to find the interquartile range (IQR) you have to know what the upper quartile and the lower quartile is. in this case, the lower quartile is 42 and the upper quartile is 54 (these are on either sides of the box on the box plot) then you subtract 42 from 54 to get the IQR of 12, the range of inside the box.
