Answer:
The function given is non-linear.
Step-by-step explanation:
The slope between (0, 2) and (2,6):
[tex]\frac{6-2}{2-0}=\frac{4}{2}=\boxed{2}[/tex]
The slope between (2,6), and (3, 12):
[tex]\frac{12-6}{3-2}=\frac{6}{1}=\boxed{6}[/tex]
Since the slopes are not equal to each other, the function is non-linear. A linear function's slope must stay consistent.
Hope this helps.