Is this relationship linear, exponential, or neither?

It is exponential.

Step-by-step explanation:

The x-values in the table are increasing by 9 and the y-values are multiplying by 2 each time. If the y value is increasing by addition, it will be linear, and if it increasing by multiplication it will be exponential.

Using a graphing website like desmos, or a graphing calculator, you can input these values to check if it is correct.

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3