1) It is a rule that relates values from a set to second set of value. a) Function b) relation c) composition d) Independent 2) Give a function C that can represent the cost of buying x meals, if one meal costs ₱40. a) a. X = C (40) b) C(x) = 40x c) x (40) = C d) X(c) = 40 + x 3) Which of the following is not true about function? a) Function is composed of two quantities where one depends on the other. b) One-to-many correspondence is a function. c) One-to-one correspondence is a function. d) Many-to-one correspondence is a function. 4) Give a function C that can represent the cost of buying x meals, if one meal cost ₱35. a) C (x) = x - 35 b) C (x) = x + 35 c) C (x) = 35x d) x (35) = C 5) Which of the following is not a function? a) a. Y= 2x + 1 b) c. y = x2 – 2x +2 c) b. x2 + y2=1 d) d. Y= 3x + 4 6) A relation where each element of the domain is related to only one value. a) relation b) Function c) composition d) Independent 7) A line that represents a graph is a function in the Cartesian plane. a) Horizontal line test b) vertical line test c) straight line test d) cartesian line test 8) Which of the following relations are not functions? a) (4,3) (1,4) (2,1 b) a. (1,5) (3,2) (3,5) c) (3,4) (2,3) (1,2) d) (2,3) (1,4) (-1,5) 9) Which of the following relations are functions? a) (1,2) (3,2) (3,5) b) (2,3) (1,4) (2,1) c) (1,2) (2,4) (1,3) d) (3,4) (2,3) (1,2) 10) Which of the following represents a function? a) Y= 2x + 1 b) x2 + y2=1 c) y = x2 + y2 d) Y2= 2x + 1

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