Brian rides a bicycle at a rate of 12 meters per second. Let m represent the number of meters biked and s the number of seconds. Which student modeled the situation correctly?

A rate of 12 meters per second means Brian bikes 12 meters for every 1 second. After s seconds, the distance is 12 × s, so m = 12s. Mina’s model, 12s = m, expresses this relationship; June’s equation reverses the variables.

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