c = 34.95u + 6.25
The domain of the function is the set of possible values of u, wich is [8, 12]
The range is the set of the possible values of c.
Since 34.95*8 + 6.25 = $285.85 and 34.95*12 + 6.25 = $425.65, the range is [285.25, 425.65]
6.5m questions
8.6m answers