How you write a polynomal function with least degree?

To write a polynomial function of least degree that fits given points, identify the x-values and corresponding y-values you want the function to pass through. The least degree polynomial is determined by the number of unique points: for ( n ) points, the least degree polynomial is ( n-1 ). Use methods such as polynomial interpolation (e.g., Lagrange interpolation or Newton's divided differences) to construct the polynomial that meets these conditions, ensuring it passes through all specified points.