Question

Which values represent the independent variable?





(4, 2), (3, 1), (2, 0), (1, –1)




A.

{4, 3, 2, 1}


B.

{4, 2, 0, –1}


C.

{2, 1, 0, –1}


D.

{–1, 0, 1, 4}