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StupidityIsKey
17.09.2019 •
Mathematics
Write an equation in slope-intercept form for the line described.
1. perpendicular to y = - 4 x + 1, pass through ( - 8 , - 1 )
2. parallel to y = 2/ x + 6, y-intercept at -2
3. parallel to y = 9 x + 3. passes through ( 6, 7)
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Ответ:
Step-by-step 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
Ответ:
12.5
Step-by-step explanation: