Answer:
Sides increase by 2 times, area increase by 4 times
Step-by-step explanation:
The scale factor is a ratio that affect the sides of an object.
So, if we use a scale factor 2 to dilate a rectangle, its sides will increase 2 times.
As the area of the rectangle is the product between the length and the width, if the length increased by 2 times and the width as well, the area will increase by 2 * 2 = 4 times.
