Domain and Range from Graphs

The domain of a function is the set of all possible input values (x-values) for which the function is defined.

The range of a function is the set of all possible output values (y-values) that the function can produce.

To find the range from a graph, identify the lowest and highest points on the y-axis that the graph reaches.

It means that the output values (y-values) of the function are all greater than or equal to 6.

The range in interval notation is expressed as [-2, 3].

The domain is expressed as [-3, 4] in interval notation.

Endpoints indicate the minimum and maximum values included in the domain or range; brackets [ ] mean the endpoints are included.

The domain is represented as (-∞, ∞) in interval notation.

The range is y ≥ 0, meaning all y-values are greater than or equal to 0.

Check if the y-value corresponding to the x-value exists on the graph.