# What is the domain and range of #y =9 - x^2#?

##### 1 Answer

Sep 8, 2017

D: All real x

R:

#### Explanation:

The domain of any parabola is *all real x*, or

The range of a normal parabola (

The range of an upside-down parabola (

Shifting the parabola up by 9 just increases the range from starting at 0 to starting at 9.

So the domain and range are:

D: All real x

R: