Perpendicular lines have slopes that are negative reciprocals. example: line a has a slope of 2/3, line b has a slope if -3/2 if they are perpendicular.
The slope is 4 or you can think of it as 4/1 if that helps. Remember slope intercept form is y=mx+b.
18 would have to be the mean because of the average
Answer:
Fourth root of 256 is ±4.
hope this helps
