Do you have students who struggle with understanding how to identify the domain and range when given a graph? If that answer is yes, I am here to help you.

Year after year my students struggled with the concept domain and range. They all understood domain is "x" and range is "y" but when it came to identifying it from a graph, they struggled. I researched to find as many teaching strategies as possible to help my students understand.I knew there had to be an answer out there. That’s when it hit me. Why do I need a “new” strategy when I can directly relate domain/range to a concept my students just tested over, AND compound inequalities!

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Let me tell you, I hit the jackpot. I literally took a graph and drew “and” compound inequalities on the x and y axes. I used two different colors to add one more element. I could see light bulb after light bulb click on.

Here is how I questioned my students through it.

“Is domain/range x or y?”

“Is x/y left to right for bottom to top?”

”What is the furthest number to the left/bottom?”

“What is the furthest number to the right/top?”

“Is x/y in the middle or apart?”

”Is ___ less than or greater than to ___?”

“Is ___ included or not included?”

“Does that mean it is open or closed circle?”

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Below are the other strategies I have used throughout my years as well