To express the relationship between the number of hours Gabriel babysits (h) and the total amount of money he earns (t), we can use the equation:
\[ t = 8h \]
This indicates that for every hour he babysits, he earns $8.
If we specifically want to find out how much he earns after 6 hours, we can substitute \( h = 6 \):
\[ t = 8(6) = 48 \]
So after 6 hours, he earns $48.
Thus, the correct choice from your options is:
t = 8h ; $48