For a line, the ratio of the change in y to the change in x is called the of the line.

Why do police officers get paid less than professional baseball players?

The owner of firewood to go is considering buying a hydraulic wood splitter which sells for $50,000. he figures it will cost an additional $100 per cord to purchase and split wood with this machine, while he can sell each cord of split wood for $125. if, for this machine, design capacity is 50 cords per day, effective capacity is 40 cords per day, and actual output is expected to be 32 cords per day, what would be its efficiency?

Considered to be a "super tool" or tool that has high use and high potential for improving project success?