Is the following relation a function? (

No

Step-by-step explanation:

To check the given graph of a relation is function or not.

Using graph check for function by vertical line test.

Draw numbers of vertical line. If any of one vertical line intersect the graph at two different points then graph is not a function.

Now check the graph using vertical line.

Draw 3 vertical line. All three vertical line intersect graph at two points.

Please have a look in attachment.

So, The graph of relation is not a function because vertical line test not pass.

pi x^2

step-by-step explanation:

pi times x squared