I need the correct equition of this line
(0,-1), (2,-5), (4, -9)

Question

I need the correct equition of this line
(0,-1), (2,-5), (4, -9)

parthkohli · Answer

Find, find the slope.


$\Large \color{MidnightBlue}{\Rightarrow {-5 - (-1) \over 2} }$

$\Large \color{MidnightBlue}{\Rightarrow -2 }$

Now, we know that it is

y = -2x + b

Let's find the y-intercept now.

$\Large \color{MidnightBlue}{\Rightarrow -5 = -2(2) + b }$
$\Large \color{MidnightBlue}{\Rightarrow -5 = -4 + b }$
$\Large \color{MidnightBlue}{\Rightarrow -1 = b }$

So, the equation is:

$\Huge y = -2x - 1$

parthkohli · Answer

Please see my tutorial for more questions. http://openstudy.com/study#/updates/4fb9f5a9e4b05565342ee28c