Aim: Why are graphs important in the field of science?

What is the purpose of a graph?

• Graphs provide an organized way to display data.

• They provide an easier way to see patterns.

• Graphs can be used to make predictions.

Creating a Line Graph• Create a title• Each axis must be properly labeled

along with respective units• Independent Variable: (the cause)

is represented on the horizontal axis (x-axis)

• Dependent Variable: (the effect of result) is represented on the vertical axis (y-axis)

• Numbers on each axis must be consistent.

• Points must be plotted in proper location, circled, and connected.

Graphing Vocabulary:Variable:

Relationship:

a factor that can be changed.

association between two variables.

How can we read a graph?

What is the mass of this object if the volume is 100 cm3? 200 grams

A is heavier than BA is shorter than BB weighs less than AB is taller than A

A is faster than BA is younger than BB is slower than AB is older than A

What are the four types of line graphs?

1. Direct Relationship: Te

mp.

(°C)

Time (Hour)

As time increases, the temperature

increases

2. Inverse or Indirect Relationship: Te

mp.

(°C)

Time (Hour)

As time increases, the temperature

decreases

3. No change, no relationship: Te

mp.

(°C)

Time (Hour)

As time increases, the temperature remains the

same

4. Cyclic Event: Te

mp.

(°C)

Time (Hour)

As time increases, the temperature

increases then decreases

How can we extrapolate information from our graph?

Extrapolate: To infer or estimate by extending or projecting known information.

Extend the line of your graph using a straight edge (ruler).

What is the volume of this object if the mass is 400 g?

Summary1. Why are graphs useful?2. What are the two variables plotted

on a graph?3. How many types of graphs are

there? What are their names?4. What does it mean to extrapolate

information from a graph?

5. What is the density of this object?