Proportional Relationship: A proportional relationship exists when two quantities change in direct proportion to each other. For example, if you double one quantity, the other also doubles.
Magnification: Magnification is a measure of how much larger an image appears compared to its actual size. It is commonly used in optics and microscopy.
Map Scale: Map scale refers to the ratio between distances on a map and corresponding distances on Earth's surface. It helps determine how much smaller or larger features are represented on maps compared to reality.