To find the missing value in the conversion chart, we need to determine how many inches there are in 6 yards.
The chart already provides the following conversions:
- 3 yards = 108 inches
- 8 yards = 288 inches
- 11 yards = 396 inches
From the information given, we can establish the conversion rate from yards to inches. Specifically, we can calculate the number of inches per yard based on the known values.
For 3 yards: \[ \text{Inches per yard} = \frac{108 \text{ inches}}{3 \text{ yards}} = 36 \text{ inches/yard} \]
Using this conversion factor, we can find how many inches are in 6 yards: \[ 6 \text{ yards} \times 36 \text{ inches/yard} = 216 \text{ inches} \]
Thus, the missing value in the table for 6 yards is 216 inches.
So the answer is D. 216.