# What is the domain and range of y=4-x^2?

Aug 1, 2015

#### Answer:

Domain and range of$y = - {x}^{2} + 4$

#### Explanation:

Since a < 0, the parabola opens downward. There is maximum (vertex) at point (0, 4)
Domain: x varies from -infinity to +infinity
Range of y: (-infinity, 4)