To find out how many eighth graders took the survey, we can add the preferences for pizza and tacos for the 8th grade.
From the table:
- 8th Grade Pizza: 54
- 8th Grade Tacos: 81
Now, we add these two values together:
54 (Pizza) + 81 (Tacos) = 135
So, the total number of eighth graders who took the survey is 135.