Have them explain how they know where to place the ordered pair. And the y coordinate is the second number in the pair.Ĭall students up to graph each point. The x coordinate is the first number in the pair. The x-axis is the horizontal line in the graph The y-axis is the vertical line in the graph. Review the graph vocabulary before you get going. If you have to hand draw your graph, that can also work, just make sure you have enough space to graph the ordered pairs when doubled. I like to use a projected piece of graph paper for this. The students can help you graph the ordered pairs on the board. Have a set of ordered pairs on the board, such as: Tell them using a graph will help you pay attention to exactly how much the triangle has to grow. Tell the students that you are going to experiment by “tagging” a triangle in two different sizes. But how do they make sure their tag looks the same no matter the size they are making it? Depending on the size of the space where graffiti artists want to tag their initials, they need to be able to make their letters bigger or smaller. Introduce the activity in a fun way by telling students that they will be graffiti artists in this lesson. One copy of Ordered Pairs Initials worksheet.2 pieces of graph paper for each student- any size.Each student needs their math notebook or a piece of paper.Set up for the Lesson: Ordered Pairs Initials This enables students to see how patterns in the ordered pairs are transferred to the visual representation on the graph. To make sense of the concept of the scale factor while providing students with more practice using the axes and coordinate pairs, I lead students in a little mathematical art project in which they draw their initials in block letters on graph paper and use multiplication to enlarge the letters. It takes a class period or two to get the X and Y axis straight, but I find that students struggle in seeing how patterns in the ordered pairs appear on the graph and, often, need extra practice with that concept. Students are usually pretty good at graphing ordered pairs. This activity (Ordered Pairs Initials) will provide students with practice in graphing ordered pairs and seeing how patterns in the ordered pairs play out on the graph. Patterns and the Coordinate Plane Played Out
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