Final answer:
The correct equation for a vertical right edge of an arch would be x=constant, where 'constant' is the x-coordinate of the right side of the arch. None of the given options a) x=0, b) y=0, c) y=x, d) x=y correctly describes a vertical line on the right side of the coordinate system without additional information.
Step-by-step explanation:
The question asks for the equation that describes the vertical right edge of an arch in a coordinate system. Among the given options, the correct equation for a line that is vertical and is situated on the right side of the coordinate system would be x = constant. However, the value of this constant isn't specified in the options provided. For a vertical line, the x-coordinate stays the same, while the y-coordinate can take any value. Assuming the line is the right edge of the arch, we'd expect this x-value to reflect the rightmost position of the arch.
None of the choices given, a) x=0, b) y=0, c) y=x, and d) x=y, accurately describe a vertical line on the right side without additional context, since option a) x=0 describes the vertical line along the y-axis, which is the left edge if we treat positive x-values as 'to the right'. Thus, to describe a vertical line to the right, we would need an equation of the form x=value, where value is to the right of the y-axis.