Answer:
The highlighted one is correct
Explanation:
The dilation by a factor of 3 means that each side must increase by 3
The top is a 2 so it becomes a 2*3 = 6
The right is a 3 so it becomes 3*3 =9
The bottom is a 3 so it becomes 3*3 =9
The left is a 6 so it becomes 6*3 =18