GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Inverse Proportionality - Explained

The video tutorial explains how the temperature of ocean water is inversely proportional to depth below 900 meters, using the formula T = 4500 / X. It demonstrates calculating temperature differences at depths of 1200 and 2500 meters, resulting in a difference of 1.95 degrees Celsius. The tutorial also guides on identifying the correct graph that represents this inverse relationship, emphasizing graph D as the correct choice.

Identify which graph (A, B, C, or D) represents the relationship T = 4500 / X and justify your choice.

Explain why the graph showing T as inversely proportional to X cannot include values where X equals zero.