The yield y of a chemical process is thought to depend on the catalyst concentration

(x1) and duration of reaction (x2). Fifteen runs of the process under different combinations of catalyst concentrations and reaction times yielded the following data.  By multiple regression, obtain the relationship among x1, x2, and the yield y.

Transcribed Image Text:

21 I2 y 21 I2 13 19 3.2 9 18 3.6 8 14 2.4 7 12 2.8 10 10 2.8 14 19 2.7 12 19 2.6 16 16 3.0 14 18 3.6 12 11 2.7 11 13 2.9 15 15 3.0 15 13 3.0 16 19 3.3 68TOTO3 13 17 3.4