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...
F&A - 10 Proportional linear relationships: Proportional linear relationships can be expressed in the form y = kx where k represents the constant rate of change or slope of the line. The graph of a proportional relationship is a straight line that passes through the origin.