Question

What is the domain of the following graph? Please don't put links down I cant download them.

Answer 1

(-inf, inf)

Explanation:

Remember, the domain of the function looks at purely the input values (x-axis), not your output values (y-axis).

Keeping this in mind, you can see that the x values stretch from the far left, -inf to the far right +inf.

Remember, as infinities aren't considered actual values, you put them in parentheses. This means your answer is (-inf, inf).

Answer 2

-infinity, infinity

Explanation:

Domain is x, and in a quadratic equation like this one the x axis goes on forever. So the first answer of -infinity, infinity is correct.