application or intradermal injection of a substance to the skin to test the body's reaction to it. Such a test detects an animal's sensitivity to such allergens as dust and pollen, or to preparations of microorganisms believed to be the cause of a disorder.
A direct relationship graph is a graph where one variable either increases or decreases along with the other. The general equation for a direct relationship graph is y = mx + b, where y denotes the...
We say Distance is directly proportional to time and thatâs why this represents a direct relation. A Directly Proportional Graph describes the relationship of a graph in words and mathematically. When the two measured physical quantities are plotted to form a straight line, we say they are âproportionalâ to each other.