Question

which display is best for showing the frequency of data grouped into intervals?
histogram
line graph
box plot
dot plot

Explanation:

A histogram is specifically designed to visualize the frequency of data that has been grouped into continuous intervals, using bars to represent the count of data points in each interval. Line graphs track trends over continuous variables, box plots show distribution quartiles, and dot plots display individual data points, none of which are optimized for grouped interval frequency.

Answer:

A. Histogram