Final answer:
The dependent quantity in the equation is represented by the variable 'w', which stands for the total amount of water in the bathtub. The total amount of water in the bathtub is dependent on the number of seconds that have passed.
Step-by-step explanation:
The dependent quantity in this equation is represented by the variable w, which stands for the total amount of water in the bathtub.
In this case, the amount of water in the bathtub is dependent on the number of seconds that have passed. As the number of seconds increases, more water is added to the bathtub.
The equation w=0.7g+8 shows that the total amount of water (w) is determined by multiplying the number of seconds (g) by 0.7 and adding 8.
Therefore, the total amount of water in the bathtub is dependent on the number of seconds that have passed.