The graph shows that as and when time increases the need for energy consumption also increases.
This might be due to increase in population with time that has lead to increase in consumption of energy.
Thus, we can conclude that out of the given options, a graph of energy consumption in the United States versus time slopes upward. This indicates that energy consumption has increased.
Oxidation half reaction is written as follows when using using reduction potential chart example when using copper it is written as follows CU2+ +2e- --> c(s) +0.34v oxidasation is the loos of electron hence copper oxidation potential is as follows cu (s) --> CU2+ +2e -0.34v