To find the total number of eighth graders who took the survey, we can add the number of eighth graders who prefer pizza and those who prefer tacos.
From the table:
- Eighth graders who prefer pizza: 54
- Eighth graders who prefer tacos: 81
Now, we add these two numbers:
54 (pizza) + 81 (tacos) = 135
So, the total number of eighth graders who took the survey is 135.
The correct answer is 135.