1. Students will be able to determine why certain graphs are misleading.
Misleading Graphs
PS.1.AC.5: Interpret and evaluate, with and without appropriate technology, graphical and tabular data displays for consistency with the data, appropriateness of type of graph or data display, scale, and overall message.
Students will be able to determine why certain graphs are misleading.
FHS
Chapter 1

2. Why is the graph misleading?
Sales of Mango Mango
What can you say about sales of the drink Mango Mango?
What is decep-tive about the graph?
How could we change it? 5 4 3 2 1
Sales (in 10,000)
Jan Feb Mar
Number of Hours
FHS
Chapter 1

3. Why is the graph misleading?
If Phil’s agent says “We need to give Phil a raise, his hits have doubled since last year!”, what would be wrong with that statement?
Phil’s Hits
How could we change this graph so that it is not mis-leading?
This year
Last year
Hits
Hits
FHS
Chapter 1

4. Why do these graphs look different?
Week 1 2 3 4 5
Sales
252
246
265
275
280
330
310
290
270
250
500
400
300
200
100
Sales
Sales
Week
Week
FHS
Chapter 1