Given data:
The given graph is shown.
The equation of the line passing through (0, 3) and (6,0) is,
[tex]\begin{gathered} y-3=\frac{0-3}{6-0}(x-0) \\ y-3=-\frac{1}{2}x \\ y=-\frac{1}{2}x+3 \end{gathered}[/tex]Thus, the equation of the line is y=-1/2 x +3, so correct option is (D).
