How to find the slope of a line

Question

ellamoyseyuk · Answer

you use the slope formula

aaronandyson · Answer

What exactly is the question here? >.<

kinged · Answer

$$m=\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }$$

kinged · Answer

That's the second time I write the same equation for you in exactly two minutes.

zarkam21 · Answer

Noo, I understand how to get the slope @Kinged

zarkam21 · Answer

The question I am is asking for the slope of a line

aaronandyson · Answer

Is there any equation /co-ordinates given?

zarkam21 · Answer

y=-5x

zarkam21 · Answer

Since I already ask alot of questions, I wanted to do this on my own lol :) Thats why just needed guidance on finding the slop of a line

zarkam21 · Answer

Slope

mjdennis · Answer

Two points make a line.  So this equation makes the slope OF A LINE.

Now, you can rearrange that equation into $$(y _{2} - y _{1}) = m(x _{2} - x _{1})$$
And then, one of the points is unknown, it could be anywhere on the line.  so instead of y-sub-2 and x-sub-2, make them variables x and y:  $$(y - y _{0}) = m(x  - x _{0})$$
Finally, multiply: $$y - y _{0} = mx - x _{0}$$
and move all the constants to one place, and call them "b"$$y = mx + (y _{0} - mx _{0})$$ $$y = mx + b$$

mjdennis · Answer

This is the other form of a line - y = m*x + b
In your case, b=0, so you should be able to look at your equation and discover m, the slope of this particular line.

zarkam21 · Answer

So for y=-5x

zarkam21 · Answer

I would just substitute it into the equation y=mx+b

mjdennis · Answer

Well, don't think of it as substituting, think of it as comparing.
Compare    y = (-5)*x + 0     to     y = m*x + b
If you write it like that, you can see what m, the slope is.

Bonus:  b is called the y-intercept.  That means two things.  When x=0, y=b, and it means y=b is the place where the line crosses the y-axis (or vertical axis)

zarkam21 · Answer

Okay so I know that -5 is the slope definitely

zarkam21 · Answer

Ohhh is the slope zero?

zarkam21 · Answer

the slope is -5 and the yintercept is 0

zarkam21 · Answer

@agent0smith

zarkam21 · Answer

ohh its just -5 as the slope :)

agent0smith · Answer

Yes. For of an equation that LOOKS LIKE y = mx+b, the slope is the m, whatever number is in front of the x