The expression "x ≤ y" means that the value of x is less than or equal to the value of y. This indicates a relationship where x can either be smaller than y or exactly the same as y. For example, if x is 3 and y is 5, then "3 ≤ 5" is true. Similarly, if both x and y are 4, then "4 ≤ 4" is also true. In mathematical terms, this inequality is used to compare two quantities. It helps in understanding limits and constraints in various fields, such as algebra, economics, and statistics. The symbol "≤" is a fundamental part of mathematical notation, allowing for clear communication of relationships between numbers.