Question

a poster is 4 inches by 6 inches and is enlarged to 12 inches by 18 inches. what is the scale factor? a. 2 b. 3 c. 2.5 d. 4

Explanation:

and the new length is 12 inches. The scale factor $k=\frac{\text{new length}}{\text{original length}}=\frac{12}{4} = 3$.

Step3: Check with width (optional)

The original width is 6 inches and the new width is 18 inches. The scale factor $k=\frac{\text{new width}}{\text{original width}}=\frac{18}{6}=3$.

Answer:

B. 3