Question

Using the data below find the slope of the regression line.

x	y	xy	x2	y2
3	4	12	9	16
4	6	24	16	36
5	7	35	25	49
7	12	84	49	144
8	14	112	64	196
27	43	267	163	441

           

Answer 1

NOTE

Here last few entries in columns XY ,X2 and Y2 are wrong .

Correct values are

	x	y	x2	y2	xy
	3	4	9	16	12
	4	6	16	36	24
	5	7	25	49	35
	7	12	49	144	84
	8	14	64	196	112
	27	43	729	1849	1161
Total	54	86	892	2290	1428

Using the above data we get

Now the formula of the slope of the regression line is

= 1.611

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