The easiest way to do this is determine the function that represents the table. Here's two coordinates (0,0) and (2,4). Now, here's the math:
[tex]x_{1} =0[/tex], [tex] x_{2} =2[/tex], [tex] y_{1}=0[/tex], [tex]{ y_{2}=4}[/tex]
First, solve for the slope:
[tex]\frac{y_{2}- y_{1} }{ x_{2}- x_{1} [/tex]
[tex] \frac{4-0}{2-0} [/tex]
[tex]slope=2[/tex]
So, the function is [tex]y=2x[/tex].
Hope this helps!