When given a graph, the vertical line test can be used to determine functionality. describe the vertical line test and explain the reasons why a graph would, or would not, represent a function.

Which statement is true about the function f(x)= square root -x ? the domain of the graph is all real numbers. the range of the graph is all real numbers. the domain of the graph is all real numbers less than or equal to 0. the range of the graph is all real numbers less than or equal to 0.