Write the equation of a line in slope-intercept form that has a slope of −3 and passes through the point (−2,1).

Question

anonymous · Answer

I know that it would be Y= -3x I just don't understand how to solve the other part of the question...

michele_laino · Answer

please you have to apply the formula below:
$$y-y _{1}=m(x-x _{1})$$
where m is your slope, and (x_1,y_1) is your point

texaschic101 · Answer

not necessarily...you could just use y = mx + b

anonymous · Answer

$$Y = -3x - 5 ?$$

michele_laino · Answer

that's right!

anonymous · Answer

Thank you for your help :)

michele_laino · Answer

Thank you!!

yamyam70 · Answer

@Michele_Laino  @texaschic101  , where did he get the value of b ? Im confused

texaschic101 · Answer

which formula do you want to use...because you can either use point slope (y - y1 = m(x - x1) or you can use slope intercept (y = mx + b) ??

michele_laino · Answer

@yamyam70  please substitute x=-2 and y=1, and m=-3, in that formula above

yamyam70 · Answer

lets go with , y = mx + b 

@Michele_Laino  oh yeah, thanks! :D

michele_laino · Answer

@yamyam70  Thanks!

yamyam70 · Answer

@texaschic101  is much simpler y= mx +b :) thank you too :)

texaschic101 · Answer

I think so to, but either way will work

yamyam70 · Answer

after all, every formula is just derived from one another

texaschic101 · Answer

so true

yamyam70 · Answer

alrighty :)