Question

how do you find the domain and range of f(x) when f(x) is 3x-5? and when it's x^2-5?

Answer 1

Domain of 3x-5: x can be anything, so it would be all real numbers
Range of 3x-5: Anything; all real numbers

Domain of x^2-5: Same thing. x can be anything; all real numbers.
Range: All real numbers.

Answer 2

Domain of x^2-5: Real numbers. Range: positive infinitiy