To determine how many students Lauren can tutor in 6 hours, we first convert the hours into a consistent unit: minutes. Since 1 hour is equal to 60 minutes, we can convert 6 hours into minutes:
\[ 6 \text{ hours} \times 60 \text{ minutes/hour} = 360 \text{ minutes} \]
Next, we need to calculate how many minutes each student takes. It is given that she tutors each student for three-fourths of an hour:
\[ \frac{3}{4} \text{ hour} \times 60 \text{ minutes/hour} = 45 \text{ minutes} \]
Now, to find out how many students Lauren can tutor, we divide the total minutes she's available (360 minutes) by the time spent on each student (45 minutes):
\[ \text{Number of students} = \frac{360 \text{ minutes}}{45 \text{ minutes/student}} = 8 \]
Thus, Lauren tutors 8 students.
The answer is 8.