Your data should be different from every other data set on earth, so copy and paste it to a (spreadsheet or word-processor) file for your later use.
Step 2: Enter the Data into your Calculator.
Press Y= and clear the Y1 function.
Press STATPLOT (2nd followed by Y=) and choose Plot1.
Under Plot1, select On (press ENTER), after Type select the drawing of disconnected dots, and make sure you have Xlist: L1(2nd followed by 1) and Ylist: L2 (2nd followed by 2).
Press STAT. With EDIT highlighted, select 1:Edit…
In the table that appears, under L1 type the x values and under L2 type the values of y. Make sure your L1 and L2 lists have the same length. (key in the data obtained from the Randomised Wave Generator)
Press ZOOM and choose option 9:ZoomStat to look at a scatter plot of your data.
Step 3: Find the Sine Wave of Best Fit for the Data.
Press STAT. Press the right arrow key to highlight CALC. Then scroll down to select C:SinReg and pressENTER ONCE.
In the SinReg screen, choose Iterations:3 Xlist:L1, Ylist:L2 and Store RegEq: Y1 (press VARS, then select Y-VARS , then select FUNCTION, and then select Y1). Then highlight Calculate and press ENTERONCE.
The calculator should now display the values for a, b, c, and d in the function f(x)=asin(bx+c)+dthat best fits the given data set.
Press GRAPH to see the sine regression function plotted along with your scatter plot and press Y1 to see the equation of your wave.