814 Math Blog (2011): Cindy's Graphing post

Sunday, November 13, 2011

Cindy's Graphing post

Graphing Post

1) There are 5 types of graphs, and they are:

Bar Graph

Advantage: It can compare the data across catagories.

Disadvantage: It can sometimes be inaccurate because of the intervals.

Double Bar Graph

Advantage: It can compare two sets of data across catagories.

Disadvantage: It can sometimes be inaccuate because of the intervals.

Circle Graph

Advantage: It compares the data to the whole using percentage.

Disadvantage: It is hard to tell the exact number of each catagories, which is hard to know the difference between catagories.

Line Graph

Advantage: It can show the change of data over time.

Disadvantage: It can only show a group of data that is among the same catagory.

Pictograph

Advantage: The data can be shown clearly and easy to read.

Disadvantage: Need to calculate to find the exact number and might be hard to understand when it is cut.

2）Show 3 ways to mislead a graph.

Distort the size of bar: Bar takes up more columns, will increase the area of the bar, to make the bar appears larger.

Distort the scale: Change the scale by putting a break in the y-axis, that changes the interval

Distort the Visual: Make some pictures in the pictograph larger than others to make it look like it has more than it actually have.

3A）Line graph and a Bar graph would show the data accurately.

I would continue to sell pizza subs. As you can see in the graph, the sale number of pizza subs are increasing. Which I believe the sale number will still go up.

4) I would choose the line graph to show Mrs. Mota because is clearly shows the increase of the healthy food choices.

4A) Change both graphs so they look more impressive.