Yes, method of least squares used in linear regression (which these formulas are based on) is a type of point estimation for getting at the slope/intercept through the data (see below).
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.965.3156&rep=rep1&type=pdf
Interval estimation would take the standard error and compute confidence intervals for the point estimate.