The equation that represents the relationship between the number of hours Gabriel babysits (h) and the total amount of money he earns (t) is:
\[ t = 8h \]
After 6 hours, you can substitute \( h = 6 \) into the equation to find the total earnings:
\[ t = 8(6) = 48 \]
So, the correct answer from the responses provided is:
t = 8h ; $48