The graph of a function never has two different points with the same x-coordinate because_ A. the graph of a function
B. the graph of a function is a vertical line
C. each input value is mapped to a single output value
D. each input value is mapped to more than one output value

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit