I was using matlab's cftool to fit a regression line to my data point x and y. And I could see this
Linear model Poly1:
f(x) = p1*x + p2
Coefficients (with 95% confidence bounds):
p1 = 1.039 (0.8671, 1.212)
p2 = -0.6122 (-1.581, 0.3569)
Goodness of fit:
SSE: 2.228
R-square: 0.9668
Adjusted R-square: 0.962
RMSE: 0.5642
I didn't get this 95% confidence interval was generated.