Statistics
Interpolation and extrapolation
Statistics
Univariate statistics

When a scatterplot is created between two variables, we describe the highest and lowest xvariables as the upper and lower poles respectively. If a line of best fit has been drawn, then predictions can be made for one variable given the other.
 If we predict a value that occurs in between the lower and upper poles, then we say we are interpolating between the poles.
 If we predict a value that occurs outside of either the lower or upper pole, then we say we are extrapolating outside the poles.