Graphs

yes they can

uh... CHINA =P

Go to paragraph put lines and spacing and it is there or it should be...

how much the different parts of something contribute to the whole.

It is a graph that shows variables that occur over time or identify frequency of an occurrance

in the form of pictograph it is probably inspired by the early sumerians scripts which has also picture based.

William Playfair. for more information go to http://en.wikipedia.org/wiki/Pie_chart & http://en.wikipedia.org/wiki/William_Playfair

Easy, just use your word processor. There should be a option for a graph, if not then get Open Office. http://www.openoffice.org/

There's no right answer, but you should consider what you are trying to show. Many bar charts have between 5 to 10 intervals, generally even intervals. The minimum and maximum of your vertical axis might be a bit below and above your data. Do you want to highlight the differences of the groups of data? If so, chose a range that closely brackets your data. For example, you make a bar chart to show the average heights of men and women of various races. If your data ranges from 5' 2" to 5' 10", you might begin your chart at 5" and end at 6", with 2" incrrements, which would highlight the differences. If your chart range was 0 to 10', you would probably not observe the differences in the groups.

Use a calculator, protractor and ruler, along with colour pencils or similar.

The main problem with bar graphs are that they can only be used when all values for x are discrete and have equal weight. For instance, if we wanted to do a graph of how many people liked different colours, we could do a bar graph. Because the x axis would have values "blue" "yellow" "green" etc. and these would be discrete answers. If we wanted to do a graph of people's weight vs their height, you could not use a bar graph. This is because height would not fit into neat categories like colour does.

bar graphs and histograms similar because In bar graphs are usually used to display "categorical data", that is data that fits into categories. For example suppose that I offered to buy donuts for six people and three said they wanted chocolate covered, 2 said plain and one said with icing sugar. I would present this in a bar garph and Histograms on the other hand are usually used to present "continuous data", that is data that represents measured quantity where, at least in theory, the numbers can take on any value in a certain range. A good example is weight. If you measure the weights of a group of adults you might get and numbers between say 90 pounds and 240 pounds. We usually report our weights as pounds or to the nearest half pound but we might do so to the nearest tenth of a pound or however acurate the scale is. The data would then be collected into categories to present a histogram

when you want to show percents................... 100% correct !

you dont

100+75+50 = 225

Explanation:

1st bar is twice of the second bar 100%

2nd bar is 75% of the first bar

3rd bar is 50% middle of first and 2nd bar

its going to be a rapid rate of change because it changes fast. a slow rate would be a steady or a smaller curve

it is time consuming because it involves cumbersome calculations

disadvantages of histogram compared to barchart

A pie graph is percentages and is harder to read because sometimes it doesn't show the %

A bar graph is more acurate because it gives you numbers and more info

A histogram is used to analyze a distribution of data. It look like a graph and can be used in many formats - the most popular may be in Photography, showing the distribution of shadows and light in a visual representation.

pictograph is a way of representing statistical data using symbolic figures to match the frequencies.

explain how to chose a key from pictograph

i don't know about online but i do know that Microsoft exel can create pictographs

you could use different line styles (a solid or dotted line) or you can use different colored lines.