Answer:
3 square units
Explanation:
You want the area of the triangle defined by the points (-1, -4), (0, -2), and (2, -4).
Triangle
The plot of the grid points and the triangle is attached. By counting grid squares, you can see that the base of the triangle is 3 units, and its heigh perpendicular to the base is 2 units.
Area
The area formula for a triangle is ...
A = 1/2bh
For base b=3 and height h=2, the area is ...
A = 1/2(3)(2) = 3 . . . . . square units
The area of the triangle is 3 square units.