Proportionality is denoted by '∝' symbol. Proportions show relationships between quantities. Proportions involve constant ratio of corresponding values
Thermal expansion occurs in solids, liquids, and gases due to heat application. Three types: linear, area, and volume expansion. Coefficient of linear expansion varies with temperature
Proportion occurs when two quantities change in a corresponding manner. Direct proportion exists when one quantity increases while the other increases. The ratio of quantities in direct proportion remains constant. The symbol for direct proportion is "∝"
Proportional sequences have constant ratios called coefficient of proportionality. Inverse proportional sequences have constant products called coefficient of proportionality. Proportionality extends to related varying quantities called variables
Direct proportion occurs when two quantities increase or decrease in same direction. Symbol ∝ represents direct proportion between quantities. Also known as direct variation
Proportion is a mathematical comparison between two numbers. Proportions are denoted using "::" or "=" symbols. Two ratios are equal when they are in proportion