To complete the equation for the vertical line of reflection of the polygon, you need the x-coordinate of the line of reflection. The equation for a vertical line is generally of the form \( x = a \), where \( a \) is a constant representing the x-value of the line.
If you're looking for a specific value for \( x \), it typically depends on the symmetry of the polygon. For instance, if the polygon is symmetric about the y-axis, the line of reflection would be \( x = 0 \). If it's symmetrical around a different vertical line, you'll need to identify the midpoint of the polygon's width.
If you have specific coordinates or dimensions of the polygon, you can calculate the appropriate value.
Please provide additional information or coordinates of the polygon so I can help you determine the specific value of \( x \).