Question

I would like to know the exact steps to solve this problem using TI-84.

Use the given data to find the equation of the regression line. Examine the scatterplot and identify the characteristics of the data that is ignored by the regression line.

x	5	3	9	13	6	8	7	11	4	12	10
y	7.18	2.54	12.20	11.54	8.96	11.48	10.40	12.58	5.04	12.24	12.56

Answer 1

Ans:

The scatter plot for above data is:

The scatter plot indicates that the best fit is polynomial of order 2,which is ignored by the regression line.

Steps to setup scatter plot using Ti 84:

1) Go to [2nd] "STAT PLOT". Make sure that only Plot1 is ON. Then go to Plot 1 and choose the Scatter Plot Icon in Type.

2)Go to Y1 and [Clear] any functions.

3)Go to [STAT] [EDIT]. Enter your data in L1 and L2.

4)Then go to [ZOOM] "9: ZoomStat" to see the scatter plot in a "friendly window".