Making &reading tables & Making &reading tables & graphsgraphs

Why use graphs & tables?Why use graphs & tables?

• They help organize information

• They help in interpreting information

When to use a tableWhen to use a table

When you want any easy way to

organize and share data.

Number Item Price Total

2 Plates $10 $20

14 Forks $1.20 $16.80

When to use a graphWhen to use a graph

Showing the Showing the relationship between relationship between two or more things.two or more things.

Such as time of day & Such as time of day & temperature or which temperature or which ice cream flavor is ice cream flavor is most popular.most popular.

Left side: what is something a car dealership might graph.

When to use a line graphWhen to use a line graph

Use a line graph with two numeric variables: Change in temperature over time.

Changes in daily tempuratures

0.0

20.0

40.0

60.0

80.0

100.0

6am 9am 12pm 3pm

TimeT

emp

(F

)

Aug

Dec

Left side: which month has the highest temperature.

Making a line graph

• The title should be about how the independent variable impacts the dependent variable.

• The X axis is always the independent variable

• The y axis is always the dependent variable

• Units are written in parenthesis (e.g. (cm) or (L)

When to use a bar graphWhen to use a bar graph

Use a bar graph when you have one numeric & one category variable: How much money was spent on different items?

0

50

100

150

200

250

cloths rent food movies

Aug

Dec

Left side: What items did the person spend more on in Dec.

When to use a pie chartWhen to use a pie chart

Use pie chart when examining percent/ proportions

vanilla

choc.

mint

mango

Left side: What ice cream flavors were most popular among 100 people? How do you know?

Summary: Answer the follow in a paragraph Summary: Answer the follow in a paragraph

1. What type of graph would be best to use when comparing temperature to plant growth?

2. What type of graph would you use to determine what kind of tree is most common in a forest?

3. Why would you record data in a table?