Answer:
Looking at the given points we know that it is going to be a triangle because it only have 3 points. Therefore the figure is a triangle and the area formula would be 
.
You can look at the attached graph and what we see is that our height of the triangle is from 
 to 
 which means that our height is 7 units high. We can also see that our base starts at 
 and ends at 
 making us have a base of 8 units.
We then plug in the values and solve



Therefore, the area of our triangle is 

Hope this helps! Let me know if you have any questions