Sod that is quoted at a set price per square yard plus a labor fee.
Cost is proportional to Area ( square yard)
Hardwood flooring that costs $16 for every 2 square feet.
Cost is proportional to area
A concrete patio quoted at bulk cost for 50 square feet.
Not enough information
Table
Cost is not proportional to area, because the values don't have a constant ratio-
Graph
Cost is proportional to area-
We can see that the function is a line.
Pavers that cost a set amount per square foot.
Cost is proportional to area
