Question

Calculate the area of a 3-inch by 5-inch photo. What would be the area if it is enlarged by a scale factor of 2? What would be the area if reduced by a scale factor of 1/2?

Answer 1

3 inch by 5 inch
A = L * W.....A = 3 * 5....A = 15 inches^2

if it is enlarged by a scale factor of 2...
3 x 2 = 6
5 x 2 = 10
Area = L * W......A = 6 * 10...A = 60 inches^2

if reduces by a scale factor of 1/2..
3 x 1/2 = 3/2 = 1.5
5 x 1/2 = 5/2 = 2.5
A = L * W....A = 1.5 * 2/5....A = 3.75 inches^2