Question

side length in rectangle c corresponding side length in rectangle d scale factor
3 1 3·□ = 1
8 4 8·□ = 4

Explanation:

Step1: Find scale - factor for first row

Let the scale - factor be $x$. We have the equation $3x = 1$. Solving for $x$, we divide both sides by 3. So $x=\frac{1}{3}$.

Step2: Find scale - factor for second row

Let the scale - factor be $y$. We have the equation $8y = 4$. Solving for $y$, we divide both sides by 8. So $y=\frac{4}{8}=\frac{1}{2}$.

Answer:

The scale - factor for the first row is $\frac{1}{3}$ and for the second row is $\frac{1}{2}$.