1. Objective - To choose a reasonable scale for a graph.
Heights of Children
Name
Age (yrs.)
Height (in.)
Adam 2
30”
Ben 4
37”
Carol 5
43”
Dan 6
40”
Ellie 9
56”

2. Bar graph of students heights and ages.70 60 50 40 30 20 10
Height
A B C D E
Names
Scale- is the series of numbers starting at 0
placed at a fixed distance on the graph.

3. Bar graph of students heights and ages.70 60 50 40 30 20 10
Height
A B C D E
Names
Interval- is the difference between one
number and the next on the scale.
The interval on this graph is 10.

4. Choose 5, 10, 20, 50 or 100 as the most
reasonable interval for the data. 10 5 50
100

5. Choose the most reasonable scale for the data.
Cookie Sale A. 40 30 20 10 B. 60 40 20 10 4 35 3 25 2 15 1
Number Sold
Week

6. Choose the most reasonable scale for the data.
Quiz Scores A. 40 30 20 10 B. 20 15 10 5 18 4 7 3 5 2 15 1
Score
Quiz