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.
So the vertical line test helps determine whether a graph represents a function. A function is increasing if the values of the response variable increase when the corresponding values of explanatory variable increase. A function is decreasing if the values of the response variable decrease when the corresponding values of explanatory variable increase. Indicate where on the graph the function is increasing and where it is decreasing. The largest and smallest values of the response variable are the highest and lowest points on the graph of a function, and they are called the (absolute) maximum and (absolute) mininimum, respectively.