Question

Marie is logging the number of radioactive isotopes she observes every minute. She has determined her function to be f(x) = −4x + 120.

Based on the situation above, describe any necessary restrictions to the domain and range. Provide justification for the restrictions.

Answer 1

Range = ( 0 120) at at x = 0, f(0) = 120 and at x = 30, f(30) = 0

Domain = (0 30) x >= 0 and at x = 30, f(30) = 0