Round 182.17 and 92.55 and 225.82 and 127.94 to the nearest 100

Which table represents a linear function? i'll give brainliest to first answer ^'^

The function show two sisters' savings account and the rate at which they plan to deposit money

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?