Answer:
The answer is the last one: One runner in the study runs 31...
Step-by-step explanation:
31 is the input (x) and 81 is the output (y) and since there's 1 ordered pair per runner, it's going to be one runner, and the input is the miles ran.
I think 53.088 is the answer
Answer:
Step-by-step explanation:

Answer:
I can't see the file
Step-by-step explanation:
If you are looking for decimals yes but if not then no