In your own words, explain what it means for a relationship between two variables to be a function

Answer 1

In simple terms, a relationship between two variables is a function if for every value of one variable, there is exactly one corresponding value of the other variable. In other words, each input value has only one output value; there are no multiple outputs for a single input. This relationship can be represented graphically as a line or curve that passes the "vertical line test," meaning any vertical line will intersect the graph at most once. Functions are a fundamental concept in mathematics and are used to describe countless real-world phenomena.