Lyn asked some of her classmates how many people are normally at home for dinner. She recorded her results in the histogram shown at right.  

1. How many classmates were surveyed?

   Hint (a):

   The vertical axis shows how many people responded for each bar.

2. How many classmates have eight or nine people at home for dinner?

   Hint (b):

   Which bar shows eight or nine people at home for dinner?

   Step 1(b):

   

   Answer (b):

   The vertical axis reading for the bar is 1, so in other words, one classmate has eight or nine people at home for dinner.

3. Can you tell which is the most common number of people at home for dinner? Why or why not?

   Hint (c):

   Each stack represents more than one number of people home for dinner.

   Answer (c):

   For this reason, you cannot know which is the most common number of people home for dinner.