A temperature graph that forms a straight line on the Celsius scale will also appear as a straight line on the Kelvin scale, as both scales are linear and have a constant offset. The key difference between Celsius and Kelvin is that Kelvin starts at absolute zero, making it a true thermodynamic scale. Understanding this relationship is crucial for interpreting temperature data accurately. Self-research, such as looking up Kelvin temperature on Google, is encouraged for deeper comprehension. This approach fosters better learning and understanding of temperature measurement concepts.