Answer:
[tex]f(x) = 4x + 18[/tex]
Step-by-step explanation:
Since there are 18 inches of snow already, 18 is our constant term in the function. Then, we describe x to be the number of hours that it snows for. We multiply this by 4 to find how many inches of snow fell during those hours. We add this term to the constant term to get the solution to y or [tex]f(x)[/tex]