Use the Following Information to Answer the Question

Use the following information to answer the question. Below is the scatterplot showing the association between raw material (in tons) put into an injection molding machine each day (x) , and the amount of scrap plastic (in tons) that is collected from the machine every 4 weeks (y) . The residual plot of the data is also shown along with a QQ plot of the residuals.

-Choose the statement that is true about the estimators for slope and intercept of a regression line when the conditions of the linear model hold.

A) The sampling distributions of the estimators follow the chi- square model.
B) The standard errors for the estimators must come from a population that is Normally distributed.
C) The estimators for the slope and intercept of a regression line are unbiased.
D) None of these