It is given that the line passes through the points (2,1) and (8,4) so the equation by two point form is given by:
[tex]\begin{gathered} \frac{y-1}{x-2}=\frac{4-1}{8-2} \\ \frac{y-1}{x-2}=\frac{3}{6}=\frac{1}{2} \\ 2y-2=x-2 \\ 2y=x \\ y=\frac{x}{2} \end{gathered}[/tex]Here y is the height and x is the width.
The value of the constant is 1/2 or 0.5.
Option C is correct.
