Final answer:
A negative correlation means that as one variable increases, the other decreases, which is depicted by a negative slope on a graph.
Step-by-step explanation:
A negative correlation between two variables means that as one variable increases, the other decreases, and conversely, as one variable decreases, the other increases. This is indicated by a correlation coefficient with a negative sign, which ranges between -1 and 0. The concept of negative correlation is characterized by a negative slope on a graph, where the line descends as it moves from left to right. For example, if we consider the price of a product and the quantity demanded, as the price increases (x increases), the quantity demanded decreases (y decreases), showing a negative correlation between these two variables.