Making very simple to very complex determinations like buying a new house or investing in a new business or buying shares in the stock market, all revolves around the understanding of how quantities and situations change over time. This awareness helps you plan in different aspects. Financially, you can calculate your savings and retirement funds for a better future or to build a better future for your kids (collage funds, weddings...etc). Physically, you can calculate your daily consumption, your needed exercise time and know how to control any weight gain so you stay healthy. How to respond