Final answer:
The direction of the electric field vector created by a positively charged particle at a given location is radially outward from the charge. It points away from the particle in a straight line.
Step-by-step explanation:
The direction of an electric field vector around a positively charged particle is radially outward from the charge. So, if a positively charged particle is creating an electric field at location a, the direction of the electric field vector at location a will depend on the position of a relative to the charged particle. If the location a is above, below, or to any side of the positively charged particle, the electric field vector at location a will point directly away from the particle in a straight line, along a radius extending from the particle. Therefore, if a is to the right of the positively charged particle, the electric field vector at location a would be pointing to the right.