Consider the following data on 20 chemical reactions, with Y = chromatographic retention time (seconds) and X = molecular weight (gm/mole).

Retention Time and Molecular Weight (n = 20)
Name	Retention Time	Molecular Weight
alpha-pinene	234.50	136.24
cyclopentene	95.27	68.12
p-diethylbenzene	284.00	134.22
decane	250.60	142.29
toluene	174.00	92.14
benzene	135.70	78.11
2-methylpentane	97.24	86.18
2,3 dimethylbutane	100.70	86.18
1,7-octadiene	172.20	110.20
1,2,4-trimethylbenzene	262.70	120.19
2,3,4-trimethylpentane	160.98	114.23
ethylcyclohexane	195.07	112.22
limonene	271.50	136.24
methylcyclohexane	153.57	98.19
m-diethylbenzene	281.50	134.22
2,3-dimethylpentane	131.83	100.20
2,2-dimethylbutane	89.34	86.18
pentane	78.00	72.15
isooctane	136.90	114.23
hexane	106.00	86.18

(a) Write the fitted regression equation

(b) Calculate R^2.

(c) Choose the right option.

i. The regression line does show a strong positive linear relationship between molecular weight and retention time, indicating that the greater the molecular weight the greater is the retention time.

ii. The regression line shows a strong negative relationship between the two variables, indicating the greater the molecular weight the lesser is the retention time.