The first Weather Bureau Office to open in Arizona was in Yuma where the duties were transferred from the Army at Fort Yuma in July 1891. Tucson followed in September of that year, and it was not until four years later that the small community of Phoenix rated a full station.
Different types of graphs depend on the type of function that is graphed. The eight most commonly used graphs are linear, power, quadratic, polynomial, rational, exponential, logarithmic, and sinusoidal. Each has a unique graph that is easy to visually differentiate from the rest.
Vertical line test: each vertical line drawn through the graph will intersect a function in only one location. Relation: A relation is simply a set of ordered pairs. The first elements in the ordered pairs (the x-values), form the domain.The second elements in the ordered pairs (the y-values), form the range. Only the elements used by the relation constitute the range.f we impose the following rule on a relation, it becomes a function. Function: A function is a set of ordered pairs in which each x-element has only ONE y-element associated with it. Function: A function is a set of ordered pairs in which each x-element has only ONE y-element associated with it.