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 t the regression, with fitted equation and R2.
(c) In your own words, describe the t. (Data provided by john seeley of Oakland University.)

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Retention Time and Molecular Weight (n 20) Name Retention Time Molecular Weight alpha-pinene cyclopentene p-diethylbenzene 234.50 95.27 284.00 136.24 68.12 134.22 pentane isooctane hexane 78.00 136.90 106.00 72.15 114.23 86.18