# What are the vertex, focus and directrix of # y=x^2 + 3#?

##### 1 Answer

Dec 22, 2015

Vertex is (0,3), focus is (0,3.25) and directrix is y=2.75

#### Explanation:

The vertex is at the point where the function is at its minimum (it would be the maximum if the

The focus is a distance

The directrix is the horizontal line an equal distance below the vertex and is therefore the line