Final answer:
The domain and range for the linear function f(x) = 3.5x + 15 are both all real numbers, as it represents a straight line with a non-zero slope.
Step-by-step explanation:
The domain and range for the function f(x) = 3.5x + 15 are both all real numbers.
This is because the function represents a straight line with a non-zero slope, and as x takes on any real value, f(x) will also take on any real value. Hence, the domain and range are (-∞, ∞).