Graphing

Graphs

- Visual representations of numerical data.

- Help see patterns.

- Makes it easy to see what happened in an experiment.

- Can predict future changes or events.

Different graphs

Serve different purposes

- Line graph = relationship between two sets of numbers

- Bar graph = good way to show distribution of measurements among particular group of objects.
- Pie graph = % of items

Two major lines

Horizontal and vertical = Axes ( singular, axis )

- Horizontal – x
- Vertical – y
- Place where these two line meet is where the graph begins

Number scale

- Sequence of numbers
- X axis – numbers from left to right
- Y axis – numbers from bottom to top
- Numbers not the same on both axes

Label graphs

- Helps reader understand them
- Label each axis
- Title the graph

Making a graph

- Several important steps