Which part of this graph shows a nonlinear relationship?

Which statements are true? see picture

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?