An elementary school is having a reading contest, to see which class can read the most number of minutes over the month. Each week, the teachers add up the number of hours their students have read at home and in school. What is the best way to display these weekly totals to show which class is ahead in the contest?
a. histogram
b. bar graph
c. box-and-whisker plot
d. scatterplot

Question

An elementary school is having a reading contest, to see which class can read the most number of minutes over the month. Each week, the teachers add up the number of hours their students have read at home and in school. What is the best way to display these weekly totals to show which class is ahead in the contest?
a. histogram
b. bar graph 
c. box-and-whisker plot
d. scatterplot