Need help with 6th grade math plz help thanks

How do you determine whether a relationship represented as as graph is linear or nonlinear

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss