Final answer:
In the equation T = 6x, 'x' represents the number of hours Rebecca babysat last week. Multiplying 'x' by $6 per hour gives her total earnings.
Step-by-step explanation:
In the equation T = 6x, which Rebecca uses to determine her earnings from babysitting, the variable x represents the number of hours she babysat last week. Since Rebecca charges $6 per hour for her service, you can calculate her total earnings (T) by multiplying the hourly rate by the number of hours worked. For instance, if she worked 5 hours last week, you'd use the equation to find her total earnings: T = 6 * 5, which would result in T = $30.