To add First you have to put a ( then you add the cell number and letter that you wish to add, after that you put a + and put the different cells you want to add, at last you put ) and press ENTER. *You must do the same procedure for the other - , * and / using this same signs.
To do an average you mut do the same procedure of adding and then close the parenthesis and divide it to the number of cells given.
There are different types of graphs or charts.
Pie.
It is used to show an average in a more graphic way. with colors. it is a fun way of showing averages.
A bar
A bar is a way of showing the columns but in a horizontal way. for some people it is easier for others its annoying.
Area
An area is a way of showing the relieve of the ground.
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