## Calculation explanation of above example

**Visualisation of data table**

**Calculation**

X = 470 lies between X = 400 and X = 500. X-fraction = (470 - 400)/(500 - 400) = 0.70

The 2 data point values to interpolate between are:

1. (400) = 100

2. (500) = 150

Interpolation:

100 + 0.70 × (150 - 100) = 135.00 which is the final result.