Answer:



Explanation:
If 2 lines are perpendicular the slopes multiplication is - 1.
If 2 lines are parallels the slopes are the same
1. slope : - 4 then
-4 * x = - 1
x = 1/4
now for the y-intercept you replace the point in the line (8,-1)
y = 1/4 x + b
-1 = 1/4 * 8 + b
-3 = b
with y-intercept the equation is:

2. y = 2/x +6 isnt a line so I assume is y = 2*x +6
In this case the line you are looking for has the same slope and y - intercept is already given

3. Again same slope, because the lines are parallels and you have to replace (6,7) to get the y-intercept
y = 9x + b
6 = 9*7 + b
b = - 57
