To find the approximate distance between San Antonio and Houston on the map, you would use the graphic scale to measure the distance between the two cities. Since I can't see the image, I can only guide you on how to interpret what you see based on the information you've provided.
- Use a ruler to measure the distance between San Antonio and Houston on the map.
- Compare that measurement with the graphic scale provided on the map to convert your measurement into real miles.
Based on common distances between the cities (San Antonio and Houston), the distance is typically around 180 miles. This is consistent with what you’ve suggested as one of the options.
Given this logic and the context provided:
The approximate distance between San Antonio and Houston is approximately 180 miles.