These histograms compare the
heights of tall buildings in two cities. Which city has more buildings that
are at least 500 but less than 600 feet tall?
Before starting any question like
this, it is important to look at both axes and understand what they show. The horizontal or 𝑥-axis shows the
height in feet. The first bar in each histogram is
the number of buildings between 400 and 500 feet. We then have the number of
buildings between 500 and 600, 600 and 700, and so on. The 𝑦-axis is represented by the
number of buildings or frequency. This type of graph is also
sometimes called a frequency diagram.
The numbers on this axis range from
zero to 10. Each block or line represents one
building. In this question, we’re interested
in the buildings that are between 500 and 600 feet. This is the second bar of each
histogram. In city A, this corresponds to
eight buildings, whereas, in city B, the second bar corresponds to five
buildings. As eight is greater than five, the
correct answer is city A. This city has more buildings that
are at least 500 but less than 600 feet tall.