what is the value of the function when x = 0?

Answer:
f(0) = -2.
Step-by-step explanation:
This question pertains to the y-intercept. By definition, the y-intercept is the point on the graph where it crosses the y-axis, and has coordinates, (0, b). It is also the value of y when x = 0. Looking at the graph, the point where the line crosses the y-axis is (0, -2). The y-coordinate is the y-intercept, b.
Therefore, the value of the function when x = 0 is: f(0) = -2.