Bar grahp

Bar Graphs

A bar graph is one way to organize data.
The bars represent the data - the longer the bar, the larger the value of the data.





Pay attention to the scale of bar graphs.
The scale tells you the value of the length of the bars.

Example: Same graphs, different scales




This graph shows that
12 students like hip hop,
8 students like classical,
7 students like rock,
and 14 students like jazz.





This graph shows that
60 students like hip hop,
40 studnets like classical,
35 students like rock,
and 70 students like jazz.





1. Is this a vertical or horizontal bar graph?
vertical
horizontal


2. How many people voted for rock?




1. Which type of music is the least popular?
jazz
reggae
hip hop
Latin
R&B


2. Order the following (1, 2, or 3) from the most popular to the least popular.
Latin
hip hop
reggae




1. How many fewer pounds of apples were sold than grapes?

2. How many total pounds of fruit sold were lemons or cherries?





1. How many more people signed up for the most popular class than for the least popular class?

2. How many sign-ups were not for the astronomy class or the archery class?




Answers


1. Is this a vertical or horizontal bar graph?
horizontal
2. How many people voted for rock?
7 people




Which type of music is the least popular?
hip hop


Types of Music Number of Students
reggae 12
jazz 11
Latin 7
R&B 5
hip hop 4


Order the following (1, 2, or 3) from the most popular to the least popular.
2 Latin
3 hip hop
1 reggae

solution

reggae 12
jazz 11
Latin 7
R&B 5
hip hop 4

How many fewer pounds of apples were sold than grapes?
pounds of apples
Solution
grape - apple =11 - 6 = 5


How many total pounds of fruit sold were lemons or cherries?
pounds of fruit
Solution
lemon + cherry = 5 + 7 = 12

How many more people signed up for the most popular class than for the least popular class?
15 people

24 - 9 = 15
Classes Number of Sign-Ups
ballet 24
philosophy 23
watercolor 21
photography 15
archery 14
astronomy 9


How many sign-ups were not for the astronomy class or the archery class?
83 sign-ups
Solution
watercolor + philosophy + ballet + photography =
21 + 23 + 24 + 15 = 83