A Platinum RTD transducer has a resistance of 100 ohms at 0 degrees celsius, 149 ohms at 120 degrees celsius and 180 ohms at 200 degrees celsius. What is the non linearity error in ohms at 120 degrees...

A Platinum RTD transducer has a resistance of 100 ohms at 0 degrees celsius, 149 ohms at 120 degrees celsius and 180 ohms at 200 degrees celsius. What is the non linearity error in ohms at 120 degrees celsius if the detector is assumed to have a linear relationship between 0 and 200 degrees celsius