Answer:
The slope of the parallel line is 3.
Explanation:
A line that is parallel to a refernce line will have the same slope. The refernce line is 3x-y=18. Rewrite it in slope-intercept form [y=mx+b] so that we can find the slope, m.
3x-y=18
-y= - 3x + 18
y = 3x - 18
The slope, m, is 3
A line parallel to this line will also have a slope of 3.
y = 3x+b
Choose any b, and the line will be parallel. I chose 5 for the attached graph. y = 3x+5