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.
<u>We then plug in the values and solve</u>
Therefore, the area of our triangle is
Hope this helps! Let me know if you have any questions