You run a regression analysis on two quantitative variables measured on a sample of 41 individuals ($\displaystyle {n}={41}$). You obtain the regression equation $\displaystyle {y}=-{3.028}{x}-{57.644}$ with a correlation coefficient of $\displaystyle {r}=-{0.725}$.

Predict what value of the explanatory variable will, on average, correspond to a value of 120 for the response variable.
Round the answer to 1 decimal place.