Is x2 plus 8 a function?

Answer 1

x2+8= y

This equation represents a function. It will be a parabola with the vertex at (0,8).

You can easily graph this on a graphing calculator or from prior knowledge.

You know the basic graph of y=x2 with vertex (0,0) and opens upwards on the y-axis. From the equation, you simply shift the vertex vertically up 8 so the new vertex is (0,8)

This represents a function because for every x value there is one y value.