Question

what scale factor should you use? to scale back to the original, use a scale factor of

Explanation:

Step1: Recall scale - factor concept

If a figure is scaled by a factor $k_1$ and then we want to scale it back to the original, we use the reciprocal of $k_1$. Here $k_1 = 0.6$.

Step2: Calculate the reciprocal

The reciprocal of $0.6=\frac{6}{10}=\frac{3}{5}$ is $\frac{5}{3}$.

Answer:

$\frac{5}{3}$