# Thread: Algebra 1

1. ## Algebra 1

Hello all, thank you for your time.
First I would like to apologize. I have asked this question before on a reply to one of my earlier threads, but, since that thread already has 3 replies, no one is reading it, thinking my first question has already been answered. I am in a slight hurry so I will ask it again. Again, sorry to all you moderators who I know do not like double-posting. I hope you understand I'm in a time-crunch.

Write the equation of the line that is parallel to line A and passes through Point P

Line A=

Point P= (-1,2)

That would be:
right?
Originally it would be +b (y=mx+b) but since it's -x the + changes to a - correct?
If so, it would be

Add 2

$-4=b$

and the answer would be

correct?
I am asking this because I have been incorrect on some -x problems I have done before. I just wanted to make sure that since it's -x, and since the equation would originally be addition, but since it's -x, it is changed to subtraction.

If i am incorrect, and you still add b instead of subtracting it, the answer is positive $1$ i believe.

2. Write the equation of the line that is parallel to line A and passes through Point P

Line A=

Point P= (-1,2)

your solution, y = 2x - 4 is incorrect ... the slope of your solution is 2, the slope of line A is -1 ... parallel lines have the same slope.

the line parallel to line A has slope m = -1 and passes through the point (-1,2).

link to using the point-slope form ... equations lines point slope

3. Sorry I typed that incorrectly:

The answer would be

$y=-x-4$

4. Wait, I don't think I'm even correct there,

if the line is $y=-x+4$

and the point is $(-1,2)$

then the equation would be

$2=1+b$
Subtract 1
$1=b$

$y=-x+1$
is, I believe, the correct answer