Final answer:
The pressure gradient force at Dallas was acting in a direction generally toward the East.
Step-by-step explanation:
The pressure gradient force at Dallas was acting in a direction generally toward the East.
The wind speed of about 10 kt indicates that the air is flowing from higher pressure to lower pressure. Since the pressure at Dallas was 1019.5 mb and the 1020-mb isobar is represented by a perpendicular line, the pressure gradient force would be acting in the direction indicated by the arrow drawn from the station circle, which is generally toward the East.