Subscribe:

## Thursday, November 10, 2011

### Dom's Graphing Post

There are 4 different types of Graphs

1. Bar Graph- It is best for comparing data across categories

Advantage: It shows the categories what has the most and least.
Disadvantage: The intervals sometimes make the bars look like it's almost the same but it's not. To make it not look the same you can change the interval by breaking the y-axis.

2. Double Bar Graph- It is best for comparing 2 sets
of data across categories.

Advantage: You can see the differences in the groups you are compar
ing.
Disadvantage: You can get confused if both of the bars are together and they are the same colour.

3. Circle Graph- It is best for compa
ring category to the whole using percents.

Advantage: It shows the total of percent for each categories and you can easily see what category has the most or least.
Disadvantage: You have to find the actual number.

4. Pictographs- It is best for comparing data that can be easily counted and represented using symbols.

Advantage: You can see the category getting higher or lower
.
Disadvantage: You have to find the actual number.

5. Line Graph- It is best for showing changes in data over time.

Advantage: You can see if it's incre
asing or decreasing.
Disadvantage: You can't see the comparisons.

2. How can graphs be misleading. Show 3 ways.

1. In a bar graph you can Break the y-axis
2. In a pictograph you make a sy
mbol or a picture larger than the others
3. In a bar you make the intervals close together.

3a) The following chart shows Pizza Sub Sales over a month. What 2 graphs would show the information accurately?
3b) If you were selling Pizza Su

3. a) I would use a bar graph and a Line graph.
b)
I would continue because it shows how much I'm selling.

4. Below you see 2 different exampl
es 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? a) Change each graph so that your information looks even MORE impressive. You may not change the data just the graphs.

I would choose the line graph because you can see it increasing.