To find the constant of variation \( k \), we can use the formula for direct variation, which is:
\[ k = \frac{P}{G} \]
where \( P \) is the total price paid and \( G \) is the number of gallons purchased.
In this case:
- \( P = 48.77 \)
- \( G = 14.5 \)
Now we can calculate \( k \):
\[ k = \frac{48.77}{14.5} \approx 3.36 \]
Therefore, the constant of variation \( k \) is \( 3.36 \).
So the correct response is:
k = 3.36.