The chart below shows the number of households in the US by their annual income in 2007,2011 and 2015. Summarize the information by selecting and reporting the main features, and make comparison where relevant.

The chart gives information about the modifications of prices every month of three metals during 2014. The major components are Copper, Nickel and Zinc. The most significant change that can be notice is that Zinc recorded a rising at the end of the year. The first six months, Nickel registered a high average about 6, […]