1. GRAPHING
Notes for Review

2. Graphs are useful tools for presenting data and other information in a small space.
Graphs should contain a title, labels on BOTH axes, units of measure, scale, and a key
(if needed).
USE a RULER!!!

3. Types of graphs

4. Circle graph / Pie chart
Shows how a part of something relates to the whole
Think of a pie cut into pieces – each piece shows a percentage

6. Bar Graph Used to compare things X-axis = horizontal axis
Y-axis = vertical axis
A key can be used to identify the things being compared
Generally used when data collected is QUALITATIVE (descriptive) and QUANTITATIVE (numerical)
Example: Height of 3 species of palm trees (Height = cm, Types= species names)

8. Line Graph Built from pairs of numbers
Used to show changes that occur in related variables; shows relationships between sets of numerical data
(ex: growth chart)
Independent variable is usually on X-axis
Dependent variable is usually on the Y-axis

10. PROPER GRAPHS: Must have these parts labeled!

11. SIGNIFICANT FIGURES
More details!!!

12. Accuracy and Precision
Accuracy is a description of how close a measurement is to the correct or accepted value of the quantity measured.
Precision is the degree of exactness of multiple measurements.
A numeric measure of confidence in a measurement or result is known as uncertainty. A lower uncertainty indicates greater confidence.

13. Significant Figures
It is important to record the precision of your measurements so that other people can understand and interpret your results.
A common convention used in science to indicate precision is known as significant figures.
Significant figures are those digits in a measurement that are known with certainty plus the first digit that is uncertain.

14. Significant Figures

15. Significant Figures

16. Rounding