It would be exactly 1.2778 yards.
The answer is 21/6
Explanation: the next number in the pattern would be 21 since this is linear
If we divide the area we have to cover by the area of a piece, we will get the number of pieces needed:

It is a diagonal line that intersects the y-axis at y=5 and it intersects the x-axis at x=-4. The slope of the graph is 5/4.