Answer:
1/7 miles per minute
Explanation:
If we make the variables "ms" equal to miles and "m" equal to minutes, we know that 0.5ms=3.5m. Then, using the multiplicative property of equality, we can divide both sides of the equation by 3.5 to get that (0.5/3.5) miles = 1 minute for Katie. That is 1/7 miles per minute if we simplify it. Feel free to ask further questions!