Final answer:
The function g(x) = 250 in Quadrant 1 has a shape that can be described as concave down.
Step-by-step explanation:
The function g(x) = 250 is a constant function, which means that it has a constant value of 250 for all values of x. In Quadrant 1, where x values are positive and y values are positive, the graph of g(x) will be a horizontal line that is parallel to the x-axis. Therefore, the term that best describes the shape of g(x) in Quadrant 1 is B. Concave down.