Inverse proportionality describes a relationship between two variables where, as one variable increases, the other decreases. For example, if you have a fixed amount of money to spend on items, buying more items means you can spend less on each one. This relationship can be expressed mathematically as x \times y = k , where k is a constant. In practical terms, inverse proportionality can be seen in various scenarios, such as speed and travel time. If you travel at a higher speed, the time it takes to reach your destination decreases, assuming the distance remains constant. This illustrates how two quantities can be inversely related.