1 Door Thickness: Most standard interior doors are 1 3/8 inches thick, and the door is slightly beveled to make the closure into the jamb. 2  Buy the correct door hardware for the application so the door handles for passage or privacy have the correct back set and bore. Door Thickness: Most standard interior doors are 1 3/8 inches thick, and the door is slightly beveled to make the closure into the jamb. 2  Buy the correct door hardware for the application so the door handles for passage or privacy have the correct back set and bore.
State whether the relationship between the variables in the table is a direct variation, an inverse variation, or neither. If it is a direct or inver...
Definition of DIRECT VARIATION. 1. : mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other. 2.: an equation or function expressing direct variation â compare inverse variation.See direct variation defined for kids.ADVERTISEMENT. mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other. 2. : an equation or function expressing direct variation â compare inverse variation. See direct variation defined for kids.