Answer: Last option.
Step-by-step explanation:
The equation of a line that passes through the origin is:
[tex]y=mx[/tex]
Where "m" is the slope of the line.
The equation for a Proportional relationship has this form:
[tex]y=kx[/tex]
Where "k" is the Constant of proportionality.
Therefore, the graph of a Proportional relationships is a straight line that passes through the origin.
As you can observe in the table, the function passes through the origin.
Now, substitute the point (1,0) into [tex]y=kx[/tex] and solve for "k" :
[tex]0=k(1)\\\\k=0[/tex]
Repeat the procedure and substitute the point (2,4) into the equation and solve for "k":
[tex]4=k(2)\\\\k=2[/tex]
Since "k" is not constant, the points given in the table are not on a straight line and, therefore, it represents a nonlinear function.