Final answer:
The ratios 16:8 and 2:1 are equivalent.
Step-by-step explanation:
Equivalent ratios are ratios that represent the same relationship between two quantities. To determine if the ratios 16:8 and 2:1 are equivalent, we can use cross multiplication to check if they are equal.
Cross multiplying 16:8 gives 16 * 1 = 8 * 2, which simplifies to 16 = 16. Since the cross products are equal, the ratios 16:8 and 2:1 are equivalent.