Find X and Y. can someone please help me with this question, thank you

The graph below could be the graph of which exponential function?

Which expression shows the sum of the polynomials with like terms grouped together

(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.