Kathy's+Notes+-+Interpolating+and+Extrapolating


 * Interpolate** //(vb)// – To estimate values/coordinates of points between those that are plotted.

The point **x** is an interpolation. It is within the range of given values. We can visually see its coordinates, which are (2,2).

**Extrapolate** //(vb)// – To estimate values/coordinates of points beyond those that are plotted. To do this, you extend a line until it reaches the values needed.

The point **x** is an extrapolation. It is outside the range of given values [(1, 1) and 2, 3)]. We cannot visually see its coordinates, and therefore, we need to extend the line. Now we can see that its coordinates are (3, 4).

Study Tip! To remember which is which, Interpolate > Inter > Inside the range. Extrapolate > Exterior > Outside the range.