What is the primary purpose of a coordinate plane pegboard in learning to graph equations?

• A. To physically plot points on the coordinate plane
• B. To measure angles in triangles
• C. To compute slopes without a graph
• D. To memorize multiplication tables

Answer: (A)

Plotting points on the coordinate plane pegboard helps you see where solutions to an equation live and how changing x and y changes a point’s location. By placing pegs at ordered pairs (x, y), you build a visual map of all the points that satisfy the equation, and connecting those points reveals the graph itself. This makes the idea that a graph is a collection of points tangible, turning algebraic relationships into a picture you can observe and understand.

Other options aren’t the main aim here: measuring angles in triangles isn’t about graphing equations, computing slopes without a graph can be done mentally or on paper, and memorizing multiplication tables isn’t related to plotting and interpreting graphs.