#### Introduction

- If we are given a set of data points:
X 1 2 3 4 5 6 7 Y 28 21 96 96 120 87 50 - We know the value of
`y`when`x`is a whole number, i.e. 1, 2, 3 - But when
`x`is 1.5 we do not have a corresponding value for`y`. - Interpolation is the method of estimating the value of
`y`for a given`x`when we don't have a data point for it.