1. Speed: Speed is the ratio of distance traveled to the time taken. It's often expressed in units like miles per hour (mph), kilometers per hour (km/h), or meters per second (m/s).
2. Density: Density is the ratio of mass to volume. It's typically expressed in units like grams per cubic centimeter (g/cm³), kilograms per cubic meter (kg/m³), or pounds per cubic foot (lb/ft³).
3. Slope: Slope is the ratio of the vertical change (rise) to the horizontal change (run) of a line. It's often expressed as a fraction (e.g., 1/2) or a percentage (e.g., 50%).
