Write the equation of a line given the points (2, 5) and (-1, -2).
HOW do you get this answer from that?

y=7/3x+1/3

Please do explain :) Thanks :)

Question

Write the equation of a line given the points (2, 5) and (-1, -2).
      HOW do you get this answer from that?

y=7/3x+1/3

Please do explain :) Thanks :)

helder_edwin · Answer

first find the slope between the two points.

anonymous · Answer

I did that but for some reason it came out completely wrong haha Linear equation completely confuse me :/

anonymous · Answer

Dont I use        y2-y1
           M=    ---------   ???? 
                      x2-x1

helder_edwin · Answer

the slope is between (2,5) and (-1,-2)
$$ \large m=\frac{5-(-2)}{2-(-1)}=\frac{7}{3} $$

helder_edwin · Answer

did u get the same?

anonymous · Answer

OH! I see what you did. Yes I now got that

helder_edwin · Answer

now given the slope $m$ and a point $(x_0,y_0)$ (which is one of the points u r given) the equation of the line is
$$ \large y-y_0=m(x-x_0) $$
just plug-in the values.

anonymous · Answer

so this is a point slope equation? yes?

helder_edwin · Answer

yes

anonymous · Answer

Thats probably where I got screwed up :) Thank you soooo much! I might ask your help when I get stuck =P haha

helder_edwin · Answer

u r welcome

anonymous · Answer

I became a fan so Ill send you a message if I need some help? If you dont mind? :) You actually explain compared to most on this site >.<

helder_edwin · Answer

sure thing.

anonymous · Answer

Great :)

helder_edwin · Answer

right now i have to go (lunch time here).
good luck.

anonymous · Answer

Thanks again! :)