Moving at a constant rate, a trench machine is advertised as being able to dig 36-foot trenches in 49 minutes. a farmer used the same machine to dig trenches that are 58.5 feet long, with each trench taking 65 minutes to complete.

chose the statement describes independent relations between the independent and dependent qualities.

1. the trench links depends on the time spent digging the trench
2. there is no relationship between the trench length and the time spent digging the trench
3. the trench lengthis independent for the time spent digging
4. the time spent digging the trench depends on the trench length