The problem asks to find the distance between two parallel lines given by the equations $y = -3$ and $y = 1$.

1. Problem Description

The problem asks to find the distance between two parallel lines given by the equations $y = -3$ and $y = 1$.

2. Solution Steps

The two lines are horizontal lines. The distance between them is the absolute difference of their y-intercepts.

Distance $= |y_2 - y_1|$, where $y_1$ and $y_2$ are the y-intercepts of the two lines.

In this case, $y_1 = -3$ and $y_2 = 1$.

Distance $= |1 - (-3)| = |1 + 3| = |4| = 4$.

3. Final Answer

4