That's an easy parallelogram, parallel to the x axis. Let's label the points
 A(-4,-1),B(-2,4),C(4,4),D(2,-1) 
AD and BC are the sides parallel to the x axis. We'll call those the base, it has length 4 - -2 = 6.
The height is the change in y between the bases, so 4 - -1 = 5.
The area is base times height, 6 × 5 = 30
Answer: 30
The shoelace formula gives us the area of a polygon from 2D coordinates without worrying about the shape:
 (-4,-1),(-2,4),(4,4),(2,-1) 
 (-2,4),(4,4),(2,-1),(-4,-1)

