SOLUTION: i am not understanding how to find an equation of a line that has a slope of -8 and passes through (-1,5). Write in slope intercept form

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Question 318599: i am not understanding how to find an equation of a line that has a slope of -8 and passes through (-1,5). Write in slope intercept form
Found 2 solutions by Fombitz, JBarnum:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The slope intercept form is, y=mx%2Bb
You know that m=-8
y=-8x%2Bb
Use your point to solve for b.
5=-8%28-1%29%2Bb
5=8%2Bb
b=-3
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.
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highlight%28y=-8x-3%29

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
slope intercept form is y=mx%2Bb where m=slope and b= intercept
you have the following:
m=-8
x=-1
y=5
substitute the letters for the numbers and solve for "b"
y=mx%2Bb
5=%28-8%29%28-1%29%2Bb multiply -8 and -1
5=%288%29%2Bb subtract 8
-3=b


rewrite equation
y=mx%2Bb
m=-8
-3=b
y=-8x-3