Answer:
It would be positive but might be either decreasing or increasing
Explanation:
Total utility (TU) is the utility which is defined as the aggregate satisfaction received or gained through consuming the given aggregate quantity of the good and service.
Marginal utility (MU), is the one which is defined as the satisfaction received from consuming an extra or additional unit or quantity of the specific good or service.
So, when the aggregate utility is increasing, then the marginal utility would be positive but might be either decreasing or increasing.