Hey,

Im in high school and im having real bad trouble with this math question.. Its finite math and im learning about linear equations.

Right now im learning about f(x) equations..

I just wanted to see if any of you knew how i would go about this question? Im not sure how to find the domain, heres the question:

"A certain pollutant is being removed from a small lake. Lettbe the number of days from the beginning of the removal process and

f(t)= 50(1 -t/120) be the number of parts per million of this pollutant in the water. Find the domain of the function and sketch its graph throughout the domain."

Thanks!!!!