find the slope and y-intercept

Question

-9x-3y=-21

Answer 1

So we know that slope intercept form is y=mx+b where m is the slope and b is the y-intercept

we just need to rearrange this equation to isolate the y

 

start by moving the x to the other side of the equation

-9x-3y=-21

-3y=9x-21

 

now we want to get the y alone so divide both sides by -3

(-3y)/-3=(9x-21)/-3

y=-3x+7 or y=7-3x

 

let me know if you have further questions