1. Introduction to Excel Cells are referenced by column then by row. For example A1 To enter data just click on the cell you want. You may need to format the cell to show in the style you want.

2. Calculations in Excel If you want to do any calculation in Excel just start with an = sign. Note that the formula bar then becomes active

3. Operations Plus + =A1 + A2 Minus –=A1 - A2 Divide /= A1/A2 Multiply *= A1 * A2 Exponents =A1^A2

4. Charts To create a chart highlight the data you want to chart, then select the chart wizard and the type of chart you want. If the data does not plot the way you want you may need to edit the source data and make sure the data is being treated properly.

5. Graphing Functions To graph a function like y = 5x-10 we must create a two column table of x and y values. Start the x-values with the smallest x then in the cell below, type = then click on the cell above and then add the step size you want. Enter to finish the calculation. To fill down the formula place the cursor over the lower left corner of the cell you just created and when it looks like a black cross, click, hold and drag down.

6. Graphing Functions To create your column of y-values start in the column to the right of the column containing your first x-value. Type = 5* then click on the x-value in the same row, then -10 and enter. Now fill down as you did with the x’s. Lastly, highlight both columns and select a scatter plot to graph them.

7. Fibonacci Sequence A man has one pair of rabbits at a certain place entirely surrounded by a wall. We wish to know how many pairs can be bred from it in one year, if the nature of these rabbits is such that they breed every month one other pair and begin to breed in the second month after their birth. F1 = 1, F2 = 2, In general, Fn = Fn-1 +Fn-2

8. Babylonian Square Roots To find the square root of x, you make a guess call it a. If a is too small then x/a is larger than the square root. If a is too big then x/a is smaller than the square root. Thus a better guess for square root of x is the average of a and x/a.

9. Babylonian Square Roots