Answer: 5 inch by 6 inch
Step-by-step explanation:
What will the dimensions of the poster be if she scales it down by a factor of one - third
Let us scale down each side one by one.
The poster is 15 in by 18 inches in dimensions
The new dimensions will be
15 × 1/3 = 5 inch
18 × 1/3 = 6 inch
The correct answer is 5 inches by 6 inches.