This is very simple. The distance between points on the X axis obviously has the following formula: x-(-3)=∣Y∣, that is, Y = (x+3), which are two straight lines.

This question should actually be "the distance between him and the point representing -3 on the Y axis is Y", so it is to find the distance between two points, that is, the distance between point (x, 0) and point (0, -3), that is, ∣ y ∣ = ∣ [(x-0) 2+(0-3). It is a hyperbola symmetrically distributed in four quadrants.