Which statement best describes the functions represented here?

x p(x)
0 30
3 60
6 120
9 240
x q(x)
0 20
3 110
6 380
9 830

A.
Only function q is nonlinear.
B.
Both functions are nonlinear.
C.
Neither function is nonlinear.
D.
Only function p is nonlinear.