To determine how many miles the whale swims in 16 days, we first need to find the whale's daily rate of swimming.
The whale swims 200 miles in 5 days, so the daily rate is:
\[ \text{Daily rate} = \frac{200 \text{ miles}}{5 \text{ days}} = 40 \text{ miles per day} \]
Now, to find the distance the whale swims in 16 days, we can use the equation:
\[ y = 40 \times 16 \]
This equation will give us the total miles the whale swims in 16 days.
Thus, the correct response is:
y = 40 × 16.