Question

8. Which relation is a function? A. -1,3).(-2,6).(0,0).(-2,-2)) B. (-2,-2). (0.01.(1,1),(2.21) c. {(4.0). (4.1), (4,2), (4,3)} D. ((7,4), (8,8). (10,8).(10. 10) I

Answer 1

Concept

Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

A function must have unique output.

For option A, the input -2 has two outputs 6 and -2. Hence it's not a function.

For option C, input 4 has three outputs 0, 1, 3 and 2. Hence it's not a function.

For option D, the input 10 has two outputs 8 and 10. Hence it's not a function.

Option B is a function