In digging a hole, the construction crew records The constant of proportionality is feet per the depth of the hole relative to the ground level.. hour. The starting depth is zero feet. The table shows (Type an integer or a decimal.) the proportional relationship between the depth of the hole and the number of hours digging. Find the constant of proportionality. How many hours of digging does it take for the depth of the hole to reach - 41.25 feet?

Digging a Hole
Hours Depth (feet)
2 -5.5
4 -11
9 -24.7
11 -3.25