Normal Equation in Linear Regression

Gradient descent is a very popular and first-order iterative optimization algorithm for finding a local minimum over a differential function. Similarly, the Normal Equation is another way of doing minimization. It does minimization without restoring to an iterative algorithm. Here, the relationship between the Number of Rooms, and the Price of the House, appears to be Linear. Here, the predictions from the Normal Equation and Linear Equation are the same.