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Alright, so lets pick up where we left off. Can you find two points on the line?

(4,7)

Yup, that's one, good job.

(2,8)

(2,0)?

Do you see how that works?

YES

Great! So now, do you remember how to find the slope?

To find the slope m of the line segment joining the points, use the slope formula

Right, so try doing that with (2,1) and (4,7)

need some help do i add those both together?

is the answer 13?

No, here's another hint:
\[\frac{7-1}{4-2}\]

And ok, now I'm actually leaving for a little bit.

Just a few minutes, though.

6,and 2

Well, 6 divided by 2.

So the slope ends up being 3.

|dw:1356749491751:dw|

-4?

The drawing is bad again, it's actually -5. But close enough that I'm pretty sure you get it.

So if your equation was y=3x+b, and b=-5, what's your final equation?

2 = 3*(-4) + b?

No, no - just plug in the value of b (-5) to y=3x+b. The x and y should stay.

okay

need some help

Ok, so you solved for b, so just put it where b was. The equation comes out to be y=3x-5.

Do you see how that works, plugging in -5 for b?

so B is the answer

Actually, it's A, since everything above the line is shaded. B would be the opposite shading.

oh okay

But still, good job!

Alright, good. I can make up another one for you to try if you want.

well i have more problems that i need to do on my homework

Oh, ok. Need help with those?

yes

Ok, want to post a new problem?