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

(a) Make a scatter plot.

(b) Use Excel to fit the regression, with fitted equation and R2.

(c) In your own words, describe the fit.

Retention Time and Molecular Weight Selected Chemicals (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