Answer:
-2
Explanation:
Given a graph of the linear function y = f(x), you want to find the value of f(-1).
Reading a graph
The expression f(-1) tells you the value of the independent variable (x) is -1. Locate that point on the x-axis, and follow the vertical line there (down) to the point where it reaches the graphed line.
Identify the horizontal line that intersects that same point, and follow it (right) to the y-axis. The value of f(-1) is the value on the y-axis at that point.
f(-1) = -2