What device is used as a tool in projecting or plotting different curves?

• A. Pantograph
• B. Proportional divider
• C. Spline
• D. Light Table

Answer: (C)

The spline is the tool for drawing flexible, smooth curves. It’s a bendable strip you shape to touch a set of control points, then trace to produce a continuous curve. That adaptability is exactly what’s needed when projecting or plotting different curves on maps—coastlines, routes, or contours can be drawn smoothly by shaping the spline to fit the desired path. Other devices serve different purposes: a pantograph copies or scales an existing drawing, not create a new curve; a proportional divider transfers distances or scales measurements; a light table just provides illumination for tracing. So the spline is the best choice for creating and adjusting diverse curves.