Rolls 2 4 6 8
Value $2 $4 $6 $8

Rolls 2 4 6 8
Value $4 $8 $12 $16

Rolls 4 8 12 16
Value $2 $4 $6 $8

Rolls 4 8 12 16
Value $4 $8 $12 $16

A roll of nickels has a $2 value. Which of these tables correctly shows the ratios of different numbers of rolls of nickels to their values?