1. Graphing Notes

2. Types of Graphs
Line Graph – used to show relationships between variables and changes over time.
Bar Graph – used for comparisons
Circle Graph – used to show percentages of a whole. The entire circle equals 100%

3. Labeling Line & Bar Graphs
Title – Describes what graph represents; include both the independent and dependent variables.
X-axis – the independent variable, along bottom, include units (seconds, cm, etc.)
Y-axis – the dependent variable, along side, include units (ml, g, etc.)

4. Numbering Graphs
Number the lines on the x and y axes in even increments (by 1s, 2s, 5s, or 10s)
Always start with zero
Graph should take up at least 3/4th of the area given

5. Line Graph Points
Ordered pair – A set of #s that describe the x value and y value of a point on a graph (x, y).
The x is the independent variable
The y is the dependent variable

6. Example Independent Variable: Time of Day (on x-axis)
Temperature (on y-axis)
Ordered Pairs:
(7:00 am, 8)
(9:00 am, 9)
(11:00 am, 11)
(1:00 pm, 14)
(3:00 pm, 12)
(5:00 pm, 10)
(7:00 pm, 6)
(hours)