Can someone do this and somewhat explain why they are or are not functions

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

This graph shows a portion of an odd function. use the graph to complete the table of values. x f(x) −2 −3 −4 −6

Derek purchased a new gym membership. it costs him seven dollars a month plus two dollars for every time that he visits the gym. he wants to spend less than 25 dollars a month to visit the gym. write an inequality that models the situation using the variable v for the number of visits per month. also find the maximum number of visits he can make to the gym and still keep his cost below 25 dollars a month.