Final answer:
A graph of a function allows you to determine the function's value at a specific point, such as g(2.8), by locating the corresponding point on the x-axis and reading the value off the y-axis.
Step-by-step explanation:
The question concerns how to use a graph of a function to find a specific function value, which is g(2.8) in this case. When working with functions and graphs, one must be familiar with interpreting the graph to determine the value of the function at a particular point.
If the function g(x) were plotted on a set of axes, finding g(2.8) would involve locating the point on the x-axis that corresponds to 2.8 and then reading the value off the y-axis at that point, assuming the graph passes through x=2.8.
If g(x) is graphed as a horizontal line, it would indicate that the function has the same value for all x in the domain. If g(x) is a more complex function, the graph could display a variety of behaviors such as increasing, decreasing, or curved patterns, and you would locate the specific point on the graph where x is 2.8 to find g(2.8).