It seems like the sentence got cut off. From what you provided, the equation $y = 4x$ represents the relationship between the tortoise's distance $y$ and the time $x$, assuming that the tortoise is moving at a constant speed. Specifically, it tells us that for every unit of time $x$, the tortoise travels 4 units of distance.

Could you please clarify what else you were trying to include in the problem? It might relate to the hare's distance, their speeds, or the conditions of the race.

Let me know if you'd like to continue with this problem! Would you like to provide more details?

Expanding the problem:

1. How would the hare's equation look if the hare traveled faster, say at 8 units of distance per unit of time?
2. How long will it take the tortoise to complete a race of 100 units of distance?
3. If the hare takes a break for 5 units of time, how much distance will the tortoise cover during that period?
4. What would the graph of the tortoise's distance vs. time look like? What does its slope represent?
5. If the hare traveled twice as fast as the tortoise but started 10 units behind, how long would it take for the hare to catch up?

Tip: In a race scenario, linear equations like $y = mx + b$ can model constant speed, where $m$ represents the speed, and $b$ might represent a head start or delay.