Posted by Preston on Tuesday, September 14, 2010 at 9:25pm.
Determine the equations of the following
lines:
(a) having slope ¡1 and passing through (0; 2)
(b) parallel to y=2x1 and passing through (¡2; 0)
(c) passing through (1; 0) and (¡1; 3)
(d) with xintercept 6 and yintercept 3.

Calculus  Preston, Tuesday, September 14, 2010 at 9:59pm
I have no clue where to begin.

Calculus  TutorCat, Tuesday, September 14, 2010 at 10:13pm
yy1=m(xx1)+b
where m=slope and b=yintercept
(a)m=1, x1=0, y1=2
(b)since it's parallel, we know that the slopes are equal; m=2
(c)m=(y1y2)/(x1x2)
yy1=m(xx1)+b
(d)since xintercept is equal to 6, we know (6, 0). since yintercept is equal to 3, we know (0,3).
Find the slope: m=(y1y2)/(x1x2)
Plug into slope and one of the two coordinates: yy1=m(xx1)+b

Calculus  Preston, Tuesday, September 14, 2010 at 10:22pm
Thanks so much helps a lot.

Calculus  MathMate, Tuesday, September 14, 2010 at 10:47pm
Preston, check if the slope shouldn't be
"1" in
"(a) having slope ¡1 and passing through (0; 2) "
Your computer seems to have a problem getting the negative sign.

Calculus  Preston, Tuesday, September 14, 2010 at 11:00pm
yea it is having trouble. thanks again. i am just stuck on my other one now
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