## Thursday, November 10, 2011

### Raeesa's Graphing Post

1a)Bar Graph- this graph is good for comparing data across categories.
Disadvantages: it can only compare one set of data and depending on the intervals, it can be inaccurate

2)Double bar graph- this graph is good for comparing 2 sets of data across categories.
Advantages: it compares two sets of data across categories
Disadvantages: it can only compare a couple of data and depending on the intervals, it can be inaccurate

3)Line graph-this graph is good for showing changes in data over time.
Advantages: it compares changes in data over time
Disadvantages:the types of data mostly used are the ones that had changed over time

4)pictograph-this graph is best for comparing data that can be easily be counted and represented using symbols.
Advantage: it compares data that can be easily counted and represented using symbols
Disadvantage: when the symbols are cut, you can't tell how much of the symbol they have taken off

5)Circle Graph
circle graph's are best for comparing categories to the whole using percents.
Advantage: it compares categories (parts) to the whole using percents
Disadvantage: it takes a long time to make and very complicated to construct
2. How can graphs be misleading. Show 3 ways.
• Putting a break on the y-axis
• Distorting the visuals (making a visual,symbol larger than the rest)
• Distorting the the size of a bar (making a bar wider,putting more area inside a bar.
3a. The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?

A line graph and a bar graph
3b. If you were selling Pizza Subs would you continue? How does your graph explain your answer.
Yes, I would continue selling Pizza Subs, because when I look at my graph, it shows me that they are selling more every week.

4a. Below you see 2 different examples of graphs showing healthy choices sold at the canteen. If you had to convince Mrs. Mota that we should continue selling healthy choices which graph would you choose?

I would choose the line graph because it looks like the canteen is selling more each month.

4b. Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.