Given,
The equations are,
[tex]\begin{gathered} y=-0.4x+40 \\ y=-0.1x+12 \\ y=-1.1x+80 \end{gathered}[/tex]The graph of the equation is,
The red line of the graph shows the equation of Alfred.
The green line of the graph shows the equations of Batgirl.
The blue line of the graph shows the equations of Robin.
Hence, the graph of the equation is obtained.
