Answer:
2
Step-by-step explanation:
The area is that of a triangle of base length 4 and height 1. The area formula gives the area as ...
A = (1/2)(4)(1) = 2
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On the graph, the "base" is the vertical distance along the y-axis. The "height" is the horizontal extent from the y-axis to the point (1, 1) where the non-vertical lines intersect.
