A linear regression equation was created to use the weight of a newborn baby seal to predict it's lifespan (Y). The equation of the regression line is lifespan=3+1.3birth weight. Which is the response variable, and why?

_______The birth weight, because it is the variable being predicted.

_______The lifespan, because it is the variable being predicted.

_______The lifespan, because it is being used to predict the birth weight.