2) The slope  of the problem is .27 and the  intercept is 4.88. This is determined by the equation. Y = A + Bx  (A = y intercept) (B = slope) And it is calculated through linear regression on my calculator.
3) The correlation coefficient(r) of the data is 0.91 and the coefficient of determination (r^2) is 0.82. This is determined through linear regression on the calculator as well