The perimeter of the rectangle is 34 units.
To find the perimeter of the rectangle, we need to find the length and width of the rectangle, which are the distances between the corresponding vertices. We can use the distance formula to find the length and width.
The distance between (-7, 2) and (4, 2) is 11 units, which is the length of the rectangle.
The distance between (-7, 2) and (-7, -4) is 6 units, which is the height of the rectangle.
Therefore, the perimeter is 2 times the length plus 2 times the width, which is 2(11) + 2(6) = 22 + 12 = 34 units.
Therefore, the answer is 34 units.