1. Constructing Graphs Notes

2. Making Double Bar Graphs
Steps to constructing graph:
Choose a consistent scale and spacing for the y-axis (vertical axis)
Draw a pair of bars for each group of data and label the bars. Use consistent spacing on the x-axis (horizontal axis)
Use different colors or designs for the different categories of the bars
Label the vertical axis and give the graph a title
Make a key to show what each bar represents
The table shows the life expectancies of people in three Countries. Make a double bar graph of the data.
Country
Male
Female
United States 67 74
Mexico 63 66
Canada 65 70 2

3. How to Make a Circle Graph
Book Type
Number of Students
Fraction
Decimal
Percentage
Angle Measurement
Mysteries
105
105/300
.35
Sci-Fi 75
75/300
.25
Sports 60
60/300 .2
Biographies 45
45/300
.15
Humor 15
15/300
.05
TOTAL
300
300/300
1.0
Book Type
Number of Students
Fraction
Decimal
Percentage
Angle Measurement
Mysteries
105
105/300
.35
35%
Sci-Fi 75
75/300
.25
25%
Sports 60
60/300 .2
20%
Biographies 45
45/300
.15
15%
Humor 15
15/300
.05 5%
TOTAL
300
300/300
1.0
100%
Book Type
Number of Students
Fraction
Decimal
Percentage
Angle Measurement
Mysteries
105
105/300
.35
35%
126°
Sci-Fi 75
75/300
.25
25%
90°
Sports 60
60/300 .2
20%
72°
Biographies 45
45/300
.15
15%
54°
Humor 15
15/300
.05 5%
18°
TOTAL
300
300/300
1.0
100%
360°
Book Type
Number of Students
Fraction
Decimal
Percentage
Angle Measurement
Mysteries
105
105/300
Sci-Fi 75
75/300
Sports 60
60/300
Biographies 45
45/300
Humor 15
15/300
TOTAL
300
300/300
Book Type
Number of Students
Fraction
Decimal
Percentage
Angle Measurement
Mysteries
105
Sci-Fi 75
Sports 60
Biographies 45
Humor 15
TOTAL
300
Book Type
Number of Students
Fraction
Decimal
Percentage
Angle Measurement
Mysteries
105
Sci-Fi 75
Sports 60
Biographies 45
Humor 15
TOTAL
Find the percent of each book (round to the nearest whole)
Find the angle measurement by multiplying the percents by 3.6 (round angles to the nearest degree)
Then use your protractor to draw the central angles for each
Find the total number of students surveyed.
Compute the fraction for each type of book.
Change each fraction to a decimal (round to the nearest hundredth) 3

4. How to Draw a Circle Graph
Use your protractor to draw a radius in the circle.
Line the hole on your protractor up with the center point of the circle and line your radius up with the zero degree mark on your protractor.
Then, count up from zero to the number of degrees you need for your particular angle and mark it.
Use your protractor as a straight-edge an connect the center point to the mark you made.
Congratulations– you just created your first angle! Repeat steps 2 – 4 for the other angles.
Once all the sections are drawn, label each section with the name and percentage and be sure to title your graph.
This video demonstrates how to make a circle graph - Watch 4

5. How to Draw a Circle Graph5

6. Making Line Plots Steps to constructing graph:
Order the data from least to greatest
Construct a number line to include the range of values.
(Be sure your number line has arrows)
Draw an ‘x’ above each number on the number line to represent each number in your data set
Be sure to title and label your graph
The table shows the number of hours Skipper spent each day bothering teachers in January. Make a line plot.
Hour
Number of Days 1 3 2 8 4 5 \ 6 7 9 6

7. Making Box-and-Whisker Plots
Steps to constructing graph:
Order values from least to greatest
Find least, greatest value, median, upper and lower quartiles
If there are two medians find the average of those two numbers
Above the number line plot the point for each value in #2
Draw a box from the lower to the upper quartile. Inside the box draw a vertical line through the median
Draw the “whiskers” from the box to the least and greatest values
Label number line and title graph
Construct a Box-and-Whisker Plot of the data: Heights of Basketball players (inches)
73, 67, 75, 81, 67, 75, 85, 69 7

8. Making Stem-and-Leaf Plots
Steps to constructing graph:
Order the data from least to greatest
Look at range and determine stems and leafs.
(Using ten digit for stem and one digit for leafs will work for most data)
List the stems from least to greatest.
List the leaves similarly
Add key and title for graph
States
Electoral Votes CA 55 GA 15 IN 11 MI 17 NY \ 31 PA 21 NJ IL KY 8 NC OH 20 TX 34
The table shows the number of Electoral votes for select states in Make a stem-and-leaf plot. 8