1. Bar graphs and dot plots
Graph notes
Bar graphs and dot plots

2. Watch this short clip about data…
R.STAT&ID2=AB.MATH.JR.STAT.DATA&lesson=html/video_interactives/datadispl ay/dataDisplaySmall.html

3. Bar graph
Type of graph that shows the number of items in a specific category.

4. Example
Use the bar graph to compare the total number of students surveyed to the ones who chose volley ball.
Steps:
Total number: = 28
Chose volleyball: 8
Compare: 28 ÷ 8 = 3.5
The number of students surveyed was 3.5 times the number that chose volleyball.

5. Dot plots
Type of graph that shows the frequency of data with a number line.
You can use a bar graph or dot plot to make part – to – whole comparisons and equivalents.

6. Example Steps: Total surveyed: 10 (count dots)
Number who own 2 tv’s: 4
Compare: = 2 5
2 5 of the families own tv’s
The dot plot shows the number of televisions that families own. What fraction of the total families own 2 televisions? Express in simplest form.

7. Circle Graphs Type of graph that displays data as parts of a whole.
In a circle graph, the percents add up to 100 since the entire circle represents the whole.
You can solve problems, using data represented in a circle graph, including part – to - whole comparisons and equivalents.

8. Example
Steps:
Find 30% of 250 by multiplying by the decimal:
0.30 X 250 = 74
-OR-
Find 30% of 250 with a proportion:
= 𝑥 250
Compare: = 175
There were 175 more students surveyed than prefer pepperoni.
A total of 250 students were surveyed. How many total students prefer pepperoni?