What point is on the graph of f(x)=4x

Step-by-step explanation:

The given function is

As you can observe this is linear function which means its graph is an straight line.

Additionally, notice that it doesn't have a constant term, that means the straight line must pass thorugh the origin of the coordinate system.

On the other hand, we can know if a specific point is on the line, or if it's part of the function, but we cannot know all points that are one the line, because they are infinite.

Therefore, this question doesn't have a concrete answer, because the function has infinte points on the line.

In the image attached you can observe some of the points that are on the line.

the answer is 99.