The disappearing city I chose is Flint, Michigan. Quaintly nestled between Port Huron and Grand Rapids, Flint was once a thriving, populous city. However as of late, that has not been the case. Now only composed of just 97,386 citizens, this city’s population is significantly smaller than that of the year 1920, which consisted of about 200,000 individuals. Flint’s high price of living coupled with its uncleanly water supply is essentially the cause of this. Additionally, the low standard of living that plagues the city pushes away potential citizens. All of these factors, and more, are why Flint, Michigan is now considered a disappearing city. Polynomial Equation: (-12*10^-5)(.6x-20)^4+(15.5*10^-4)(.4x-20)^3+(0.11)(.4x-20)^2+.5x+151.543I believe a polynomial model for the population of Flint is only somewhat appropriate. This is because Flint’s population does, in fact, have dips and curves such as those that can be found in a polynomial function. However, after the maximum point located in the year 1960, the population begins to decrease at a gradual, steady rate. This produces a graph that straightens out into a diagonal line. From said point onwards, the model does not have any more outliers and, in turn, does not have any more curves. Therefore, a linear model would better portray the data following the year 1960.My polynomial model has increasing intervals from 1920 to 1930, and from 1940 to 1950. There are also decreasing intervals from 1970 to 2016. This shows the timeframe in which the population increased and then decreased. To further explain, as “x” nears infinity, “y” approaches negative infinity. This essentially shows that as the years increase, the population decreases. On the other hand, as “x” advances toward negative infinity, “y” nears negative infinity as well. This means that as the year decreased, the population also decreased. Unlike most other polynomial functions, the domain and range for my polynomial model does not include all real numbers. This is because my model is based on the population which could never be a negative number. Therefore, the domain is 0 to infinity. This essentially shows that the population can be any number as long as it is a real number and is not negative. Identically, the range for this function is the same as the domain. This is due to the fact that the year could also never be negative.One can see on the polynomial model that the maximum point is (40, 196.94), which is located in the year 1960. This means that there was a spike in the population during this time period. One reason for this was industrial development. In the year 1960, many of Flint’s officials put forth a notion to modernize their city. They drew up a new master plan and designed an overall better layout for Flint. By doing this, they attracted many individuals to the city. Conversely, the minimum point can be found in the coordinates (40, 196.94), which is the year 1940. This shows that there was a significant decrease in the population in said timeframe. For instance in 1940, there was an economic downfall. Many businesses moved from the area which consequently caused a significant decrease in jobs available. Due to this reason, many citizens left the city in hopes of better opportunities.Overall, the data trend for Flint, Michigan’s population is decreasing due to the large number of citizens who have been vacating the area. The main reason for this is because of its low quality of living. Having fewer than 100,000 citizens means that Flint gets significantly less amount of federal, and state, funding compared to other cities that are more populous. This coupled with the fact that businesses are moving out from the area creates a disastrous problem. Adequate revenue is not coming into the city, therefore, forcing officials to have to come up with ways to cut back on spending.These moneysaving ideas often start off strong, however, many of them end up causing more damage to the city. Flint’s water crisis is a notable example of this. Wanting a cheaper water supply, city officials decided to stop getting water from Detroit Water and Sewerage Department (DWSD) and instead build their very own pipeline linking to Lake Huron. Knowing that the construction time for that project would be long, the Flint River was soon opened as a water source for its residents. The water from this source was untreated and was found to contain hazardous substances such as E.coli and lead. Despite this, citizens had no other choice but to consume it considering it was their only source of water. Soon, residents began to develop health issues that linked to the contaminated water, causing them to go to the city officials in hopes of fixing their only water supply. Despite the now well-known hazard the water posed to its citizens, the government refused to change it saying that in order to do so, the costs would heavily increase, a problem they could not deal with. This notorious predicament is still plaguing Flint and has been pushing more and more of its residents out.By looking at the data, it is quite plausible to believe that Flint will disappear between the years 2065 and 2066. One can find this data by plugging the years into the polynomial equation listed above. An alternative method to this, would be to use a linear equation. As mentioned before many of the end points of the polynomial model fall into a linear line. By creating a linear equation based from these points, one could also find the year the population reaches zero. However in order to do so, more data points for the year will have to be plugged into the table and then into the formula.In summation Flint, Michigan, a city notorious for its low quality of living, is now classified as a disappearing city. Between the years 2065 and 2066, it population will have dwindled down so much, that it will no longer be existent. Despite that, if Flint’s city officials put forth a greater effort to deliver clean water to its residents, as well as introduce more jobs into the area, Flint’s population might just have hope for the future.