The independent variable = t
The dependent variable = d
Domain = 0 ≤ t ≤ 6
Range = 0 ≤ d ≤ 420
Step-by-step explanation:
Number of hours for the trip = 6
The function model: d(t) = 70t
t = time is measured in hours
d = distance covered
Independent variable doesn't depend on a variable
The independent variable = t
The dependent variable depends on time
The dependent variable = d
The domain are all input values. In this case they are the t values
Since the trip took 6 hours, the domain is from 0 to 6hours
Domain = 0 ≤ t ≤ 6
Range are the output values. In this case they are the d values
To get the range, we insert the values of t in the function.
when t= 0
d = 70(0) = 0
when t = 6
d = 70(6) = 420
Range is from 0 to 420
Range = 0 ≤ d ≤ 420