Let's assume
independent variable is x
dependent variable is h
A linear function h models a relationship in which the dependent variable increases 1 unit for every 5 units the independent variable decreases.
so, we can use formula of linear function
[tex]h=mx+b[/tex]
where
m is slope
[tex]m=-\frac{1}{5}[/tex]
now, we can plug values
[tex]h=-\frac{1}{5}x+b[/tex]
The value of the function at 0 is 3
so, at x=0 , h=3
we can use it and find b
[tex]3=-\frac{1}{5}*0+b[/tex]
[tex]b=3[/tex]
now, we can plug back
[tex]h=-\frac{1}{5}x+3[/tex]
now, we can draw graph
Graph: