Maths

determine if this is a function?
y= x
show working method please

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  1. Graph the Eq and draw a vertical line
    through it. The line will intersect the
    graph at only one point. Therefore, the Eq is a function; because it passed the vertical line test.

    If you graph an X-parabola and perform
    the vertical line test, the line will
    intersect the graph at 2 points. There-
    fore, the X-parabola is not a function;
    because it does not pass the vertical
    line test.

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