Please help me on this test I’m going to fail I need your help.

Which of these tables represents a non-linear function?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.