hello I'm stuck on this problem can you please help me I need to know the equation but mostly I'm confused on where to plot the dots on the graph to make my line

The temperature on the surface detected by the scientist is 40 degrees.
The magnitude of the temperature change as height increases is - 3 degrees.
Assuming,
[tex]\begin{gathered} H\text{ = Height above the surface.} \\ T\text{ = Temperature at certain height.} \end{gathered}[/tex]Further,
[tex]\begin{gathered} AtH=0,T=40^0C \\ AtH=1,T=37^0C\text{ and so on.} \end{gathered}[/tex]Therefore the required equation relating H with T is calculated as,
[tex]T\text{ = 40 - 3H}[/tex]For the graphical representation,
Consider H on the x axis and T on Y axis.