Juliana is correct because she can multiply 6 and 10 by any number to form an equivalent ratio.
To elaborate, for any positive integer \( n \), the ratio \( 6n : 10n \) gives an equivalent ratio to \( 6 : 10 \). For example, if \( n = 1 \), the equivalent ratio is \( 6 : 10 \); if \( n = 2 \), it becomes \( 12 : 20 \); if \( n = 3 \), it becomes \( 18 : 30 \), and so on. This process can be continued indefinitely, showing that there are indeed an infinite number of equivalent ratios.