The file transfer is an illustration of a linear function.
See attachment for the graph of [tex]\mathbf{f(t) = 60 + 4t}[/tex]
The given parameters are:
[tex]\mathbf{Rate = 4MBps}[/tex]
[tex]\mathbf{Initial = 60MB}[/tex]
Let the time be represented by t, and the size of the file with f.
So, the size at time t is:
[tex]\mathbf{f(t) = Initial + Rate \times t}[/tex]
This gives
[tex]\mathbf{f(t) = 60 + 4\times t}[/tex]
[tex]\mathbf{f(t) = 60 + 4t}[/tex]
See attachment for the graph of [tex]\mathbf{f(t) = 60 + 4t}[/tex]
Read more about linear graphs at:
https://brainly.com/question/20853486