SOLUTION: Find an equation of the line having the given slope and containing the given point. m= -3,(4,8)
The answer book gives the answer as -3x+20.
I understand how they got the -3x
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Question 273307: Find an equation of the line having the given slope and containing the given point. m= -3,(4,8)
The answer book gives the answer as -3x+20.
I understand how they got the -3x because the question says the m=-3. The formula is y=mx+b. How did they get the +20? Can you show me how?
Thank you
jpa
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
through (4, 8)
Use the point-slope form of the equation of a line to derive the desired equation:
 )
where )
are the coordinates of the given point and 
is the slope of the given line.
So:
\ =\ -3\left(x\ -\ (4)\right))
Simplification is left as an exercise for the student.
John
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