Given:
Given that the graph of a line with coordinates (-3,2) and (0,-2)
We need to determine the slope of the line parallel to the given line.
Slope:
The slope of the line can be determined using the formula,

Substituting the coordinates (-3,2) and (0,-2), we have;

Simplifying, we get;

Thus, the slope of the given line is

Slope of the parallel line:
The parallel lines always have the same slope.
Thus, the slope of the parallel line is

Hence, the slope of the parallel line is

Therefore, Option c is the correct answer.