Simple Regression Line

For 12.8(p481)

Define dollars spend on advertising as x asix and total sales as y asix.

X	Y	X^2	X*Y	N
12.5	148	156.25	1850	8
3.7	55	13.69	203.5
21.6	338	466.56	7300.8
60	994	3600	59640
37.6	541	1413.76	20341.6
61	89	3721	5429
16.8	126	282.24	2116.8
41.2	379	1697.44	15614.8
254.4	2670	11350.94	112496.5
SSxy	27590.5
SSxx	3261.02
b1	8.460696347
b0	64.69985618

So,the equation of the simple regression line to predict sales from advertising expenditures is Y=64.7+8.46*Y

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Equation of the regression line of GDP and Fertility.

Define Total Fertility Rate as X asix and GDP Per Capita as Y asix.

X	Y	X^2	X*Y	N
2.10	9.7	4.41	20.37	10
5.97	1.5	35.6409	8.955
1.59	37.3	2.5281	59.307
1.30	7.4	1.69	9.62
1.84	16.6	3.3856	30.544
2.01	52.8	4.0401	106.128
1.80	3.8	3.24	6.84
2.35	13.6	5.5225	31.96
0.85	4.1	0.7225	3.485
4.09	2.5	16.7281	10.225
23.90	149.3	77.9078	287.434
SSxy	-69.393
SSxx	20.7868
b1	-3.338320473
b0	22.90858593

So,the equation of the simple regression line to Total Fertility Rate from GDP Per Capita is Y=22.9-3.34*X