Question

A function
represents the total amount of money in a savings account after
months have passed.
What values, if any, will be excluded from the domain of this function?


none

values less than 0 and greater than 12

all negative values

all positive values

Answer 1

Answer: all negative values.

Reason: time in months can't be negative, so the domain is t ≥ 0. (Unless the problem restricts t to whole months, in which case t is nonnegative integers, but still excludes negative values.)