For example, \(y=\frac{4}{x-2}\): Note that as the graph approaches x=2 from the left, the curve drops rapidly towards negative infinity. This is because the numerator is staying at 4, and the denominator is getting close to 0. That means that the fraction itself is getting very big and negative.
Causes of flooding. A flood occurs when a river bursts its banks and the water spills onto the floodplain. Flooding tends to be caused by heavy rain: the faster the rainwater reaches the river channel [river channel: The part of the river that holds the water. ] , the more likely it is to flood.
There is an increased risk of contracting diseases such as tuberculosis, some blood borne viruses, and infections of the gastrointestinal tract. Flood waters are a very dangerous environmental condition, even after the initial flooding has passed.Through an increase in water borne disease and disease vectors, flooding has the potential to be very dangerous for human health and safety.here is an increased risk of contracting diseases such as tuberculosis, some blood borne viruses, and infections of the gastrointestinal tract. Flood waters are a very dangerous environmental condition, even after the initial flooding has passed.