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...
A relationship between two variables can be described by an equation or a formula. This relationship can be linear, quadratic, square root, or almost any other type of function you can think of. We will focus here on a linear relationship between two variables where one is a constant multiple of the other. This is a special relationship called direct variation. In general, we say that y varies directly as x if there is a constant k so that the equation is true. When graphed, the constant k will be the slope of the line, y = mx + b.