Plz help me with all these

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Which of the following best describes the delian problem?

(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.