A real estate agent would like to predict the selling price of a single-family house by predicting the price (in $1000) based on the square footage (in 100 square feet). Calculate a 95% confidence interval for the slope of the true regression line.

How do i do this activity, is appreciated

What is the answer to the question 5x+2x

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?