Determine the rate and the unit rate. $279 for 9 tickets. $18 for 6 volleyballs. 4 fouls in 20 minutes. 36 strikeouts in 54 innings.

The rate is the ratio and the unit rate is the rate when the denominator is 1.

$279 for 9 tickets.

=> rate = $279 / 9 tickets = > unit rate = $ 31 / ticket

$18 for 6 volleyballs.

=> rate = $ 18 / 6 volleyballs = > unit rate = $ 3 / volleyball

4 fouls in 20 minutes.

=> rate = 4 fouls / 20 minutes = > unit rate = 0.2 fouls / minute

36 strikeouts in 54 innings.

=> rate = 36 strikeouts / 54 innings = > unit rate = 0.67 strikeouts / inning