What is the equation in point-slope form of the line passing through (–2, 0) and (2, 8)?

y = 2(x + 2)

y = 2(x – 2)

y = –2(x – 2)

y = –2(x + 2)

Question

What is the equation in point-slope form of the line passing through (–2, 0) and (2, 8)?

 y = 2(x + 2)

 y = 2(x – 2)

 y = –2(x – 2)

 y = –2(x + 2)

anonymous · Answer

point-slope form:
y1 - y2 = m (x1 - x2)

Then, find the slope of the line.

slope equation:
y1 - y2 / x1 - x2
8 - 3 / 2 - 3
5 / -1
-5

Next, plug in the coordinates in the right place.

x2:
2 or 3

y2:
8 or 4

plug-in:
y - 4 = -5 (x - 3) 
y - 8 = -5 (x - 2)

And that's the equation you can use either coordinates if you'd like.

anonymous · Answer

http://answers.yahoo.com/question/index?qid=20100530112940AAv1hKn

anonymous · Answer

sorry I am doing my HW and giving you your answers

anonymous · Answer

so needed to take it frm there

anonymous · Answer

y = 2(x – 2)

mimi_x3 · Answer

$y=mx+b$ 
Use the gradient formula to find $m$ which is the gradient: $$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}  $$
Then sub then $x-value$ and $y-value$ to find $b$
Then you will find the equation.
Try it!