What does interval mean in math for grade 5 and graphs?

In math, an interval refers to a range of numbers between two specific values. For example, the interval between 2 and 5 includes all the numbers from 2 to 5, such as 2, 3, 4, and 5. On a graph, intervals are often represented on the number line, showing the space where these values exist. Intervals can be open (not including the endpoints) or closed (including the endpoints).