Final answer:
The slope of the dashed line, assuming it's perpendicular to the solid line with a slope of 4, is the negative reciprocal, which is -1/4.
Step-by-step explanation:
If the slope of the solid line is 4, and we want to determine the slope of the dashed line, we need additional information about the relationship between these two lines. However, assuming from the options provided that the dashed line is meant to be perpendicular to the solid line, we can say that the slope of the dashed line is the negative reciprocal of the slope of the solid line. The negative reciprocal of 4 is -1/4, which means the slope of the dashed line is -1/4. Therefore, the correct answer is B) -1/4.