x: 0 1 2 3 4

Question

y: 1 3 9 27 81
Nonlinear; function
Nonlinear; not a function
Linear; function
Linear; not a function

Answer 1

Nonlinear; function

Answer 2

x: -2 -1 0 1 2
y: -7 -4 -1 2 5
Nonlinear; function
Nonlinear; not a function
Linear; function
Linear; not a function

Answer 3

Linear; function