Predict from a transformed regression model
The explanatory variable is worker count (workers), symbol w; the response variable is completion time (h), symbol t. The square transformation applies to the explanatory variable only. Symbols represent numerical values in the stated units
Measurements of worker count and completion time were collected for the work schedules
The original worker count values used to fit the model ranged from 8 to 12 workers, inclusive
The displayed equation defines the model. Use its displayed coefficients exactly
\[\widehat{t}=179.4 - 1.0\bigl(w^{2}\bigr)\]
The response variable is measured on its original scale in h
The prediction input is 9 workers