1. What to do… Open your notes to page 9
Answer the following question in the Think about it… What must you do after you have collected data in an experiment?

2. Graphs and Charts
Standard: Inq.3 - Interpret and translate data in a table, graph, or diagram.

3. Graphs and Graphing
There are five types of graphs that are typically seen: 1. Bar Graphs - show comparisons between data; horizontal 2. Line Graphs - compare two variables. Each variable is plotted along an axis

4. 3. Pie Charts - are a type of graph used to represent a part to whole relationship. 4. Scatter Graphs - similar to line graphs; map quantitative data points but are not connected with a line. 5. Column Graphs - show comparisons between data; vertical

5. Reading Graphs Read the title of the graph first.
Read the title of the vertical and horizontal axis.
Read the numbers on the axis and determine what the number represents.
Read the categories.
If a Key is provided, read the key. (Usually found on pictographs, line graphs, or multiple bar graphs)
Graphs should be easy to read

6. Bar Graphs
Title of graph
Vertical Axis
Horizontal Axis

7. Line Graphs Line graphs show specific values of data.
Line graphs show clear trends in data.
Line graphs help to make predictions about where the trends in the data might be going.

8. 1. What was the minimum wage in January, 1978?
2. When did the minimum wage reach $3.35?
3. Between what time periods was the largest increase in minimum wage?
4. Based on your observations of the graph, make a prediction about what the wage might be in the year 2000.
$2.65
1981
up $.40
continue to increase

9. Scatter plot graph
A dot or small circle represents a single data point.
With one mark (point) for every data point, visual data can be seen.
Depending on how tightly the points cluster together, you may be able to understanding a clear trend in the data.

10. Accuracy & Precision Accuracy: Precision:
How close you are to the actual value
Depends on the person measuring
Calculated by the formula:
Precision:
How finely tuned your measurements are or how close they can be to each other measurement.
Depends on the measuring tool
Determined by the number of significant digits

11. Accuracy & Precision may be demonstrated by shooting at a target.
Accuracy is represented by hitting the bulls eye (the accepted value)
Precision is represented by a tight grouping of shots (they are finely tuned)

12. DO! Create a graph and then plot your accuracy and precision points80 70 60 50 40 30 20 10
Day
Number of Miles
Monday 40
Tuesday 55
Wednesday 70
Thursday 80
Friday 65
Saturday 50
Number of Miles
M T W TR F S
Day of the Week

13. Precision without Accuracy No Precision & No Accuracy
Accuracy & Precision
Precision without Accuracy
No Precision & No Accuracy
Accuracy without Precision

14. Keys to Understanding At LEAST 5 complete sentences
Summarize the main points of the lesson
Describe in detail the important ideas
Write about concepts you want to remember
This should be helpful to YOU!