Consider the following data on 20 chemical reactions, withY= chromatographic retention time (seconds) andX= molecular weight (gram/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-diethyl benzene	284.00	134.22
decane	250.60	142.29
toluene	174.00	92.14
benzene	135.70	78.11
2-methyl pentane	97.24	86.18
2,3 dimethylbutane	100.70	86.18
1,7-octadiene	172.20	110.20
1,2,4-trimethyl benzene	262.70	120.19
2,3,4-trimethyl pentane	160.98	114.23
ethylcyclohexane	195.07	112.22
limonene	271.50	136.24
methyl cyclohexane	153.57	98.19
m-diethyl benzene	281.50	134.22
2,3-dimethyl pentane	131.83	100.20
2,2-dimethyl butane	89.34	86.18
pentane	78.00	72.15
isooctane	136.90	114.23
hexane	106.00	86.18

Click here for the Excel Data File (a)Write the fitted regression equation.(Round your answers to 4 decimal places.A negative value should be indicated by a minus sign.) (b)CalculateR².(Round your answer to 4 decimal places.) (c)Choose the right option. multiple choice

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

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