Question

What is the domain of the function y = 2x²? To answer the question, ask yourself if there

are any restrictions on the values you may substitute for x.

Answer 1

The domain of the function y = 2x² is all real numbers, since there are no restrictions on the values that may be substituted for x.

Answer 2

Explanation:

Any value of x may be substituted into this function. So the domain is:

`D=(-\infty , \infty)` or D=all real
`x`

I am not sure the format how you have been taught to write the answer.