Question

Which values represent the independent variable?

(–2, 4), (3, –2), (1, 0), (5, 5)
A.
{–2, 3, 1, 5}
B.
{4, –2, 0, 5}
C.
{–2, 4, 3, –2}
D.
{–2, –1, 0, 5}