To determine the slope of the new road that will be perpendicular to Main Street, we need to know the slope of Main Street itself. The property of perpendicular lines states that the slopes of two perpendicular lines are negative reciprocals of each other.
If we let the slope of Main Street be \( m \), then the slope of the new road (which would be perpendicular to Main Street) would be \( -\frac{1}{m} \).
Unfortunately, we don't have the slope of Main Street provided directly here, but generally, if Main Street has a defined slope of \( m \), the slope of the new road will be calculated as \( -\frac{1}{m} \).
If you can provide the slope of Main Street from the image or context, I can give you the final answer. Otherwise, if you just need the concept, remember you need to identify \( m \) from Main Street to find the corresponding perpendicular slope.