No. Here are two common and practical kinds of curve fitting: 1. Least squared polynomial fit. This finds a curve that approximates a set of (x, y) pairs. 2

No. Here are two common and practical kinds of curve fitting: 1. Least squared polynomial fit. This finds a curve that approximates a set of (x, y) pairs. 2. Polynomial interpolation This makes a polynomial which goes exactly through the given points.