123 4
f(x) 6 9 14 21
Which function was used to make the pattern?
A. f(x) = 2x + 4
B. f(x) = x2 + 5
O C. f(x)= x+5
D. f(x) = 2x2 + 4

(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.