How to Show a Range on a Graph

By Marija Kero

Showing range on a graph will require you to pay close attention to both the X and Y axis. Show a range on a graph with help from an experienced mathematics professional in this free video clip.

Transcript

Hi, my name is Marija. And today, I'm going to show you how to show range on a graph. I'm going to draw a coordinate plane with our X and Y axis. And we'll draw a function on this graph, we'll draw line segment AB. Range refers to all of the possible Y values that are in your relation or function. So, what we're looking for is, what is the span of Y values that are on my graph right now. So, we're going to say that this point right here, let's say, it's at negative two on the Y axis. And this point right here is at about positive five on the Y axis. So, because this is a line segment, and ends here and here, the range is going to be again, the Y values, starting at negative two and going up to positive five. The the way that we write the range because it includes the negative two and the five, is negative two comma five with brackets. If there was an open circle here indicating that this point was not part of the graph, then we would write a parenthesis negative two and a five with a bracket. So, the parenthesis indicates that the point is not included in the range and the bracket includes that the point is included in the range. So, if it's shaded, it's a bracket and if it's pen, it's a parenthesis. And that is how you show range on a graph.

About the Author

Marija Kero graduated from the Pforzheimer Honors College at Pace University with a Bachelor's Degree in Mathematics and Adolescent Education.