Which of the following is a suitable teaching aid in solving quadratic and simultaneous equations?

Teaching aid refers to any tool, material, or resource used by a teacher to enhance learning and make the teaching process more effective and engaging.Key Points

• Graphs visually represent the solutions of equations by showing the points of intersection, roots, or trends, making abstract concepts easier to understand.
• For quadratic equations, the graph of a parabola helps students identify the roots where the curve intersects the x-axis.
• For simultaneous equations, plotting both equations on the same graph helps students find the solution as the point of intersection.

Hint

• Magic Lantern - An outdated projection device, not specifically effective for mathematical problem-solving.
• Bulletin Board - Useful for displaying information, not for solving equations.
• Lingua Phone - A tool used for language learning, irrelevant to mathematics instruction.

Hence, graph is the correct answer.