Final answer:
Point A's movement of '2 units down and 1 unit right' represents a vector in physics, with 'down' being negative and 'right' being positive. This is depicted by moving 2 units down and then 1 unit to the right from point A on a graph.
Step-by-step explanation:
The question involves the concept of vectors which is a part of physics. Vectors are mathematical entities that have both magnitude and direction. When the question states point A is moved '2 units down and 1 unit right', this is describing the movement of point A in terms of a vector.
According to the conventions typically used in physics, as indicated in Figure 2.7, 'downward' movement is considered negative, while 'rightward' movement is considered positive. Therefore, the vector representing this movement would have a negative component for the vertical (downward) movement and a positive component for the horizontal (rightward) movement. To depict this vector on a graph, you would start at point A and move 2 units downwards (which is negative) and then 1 unit to the right (which is positive).
An example clarifying the direction convention is given in Figure 2.3, where a professor's displacement relative to the blackboard is shown with an arrow pointing to the right, designated as '+2.0 m' for the displacement, which is considered positive.