For a polygon to have a vertical line of reflection, the x-coordinates of its vertices must be symmetric about a certain vertical line. In this case, the equation of the vertical line of reflection can be found by calculating the average of the x-coordinates of its vertices.
Let’s assume the x-coordinates of the octagon vertices in quadrant 2 are \( x_1, x_2, ..., x_8 \). To find the line of reflection, you would use the formula:
\[ x = \frac{x_1 + x_2 + x_3 + x_4 + x_5 + x_6 + x_7 + x_8}{8} \]
If you can provide the specific x-coordinates of the vertices, I can help you calculate the exact equation for the vertical line of reflection. If you have such coordinates or specific values, please share them, and I can complete the equation for you.