please solve all parts

9. Because low-birth-weight babies have a much higher mortality rate, researchers have examined the relationship between birth weight (grams) and a mother's age. Data on n = 10 births that is suitable for linear regression analysis produced this regression table: Estimate Std. Error t value Pr(> It]) (Intercept) -1163.45 246.80 -4.71 0.002 mother's age 245.15 45.91 5.34 0.001 S = 205.31 R2 = 78.09% a. What is the correlation? b. Write the equation for the regression line. C. How many degrees of freedom are there for these data? d. Construct a 95% confidence interval for the slope of the regression equation and interpret its meaning