Is anyone good with slopes and lines for algebra?

- Liv1234

Is anyone good with slopes and lines for algebra?

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- Mehek14

yes

- Liv1234

Can you help me please?(:

- Liv1234

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- Mehek14

do you know the formula?

- Liv1234

I learned it in ninth grade and I really don't remember it, but if you show me it, I'm sure I can remember some of it.

- Mehek14

\(\bf{\dfrac{y_2-y_1}{x_2-x_1}}\)

- anonymous

sorry (i know this is annoying) don't have any help to give but love your profile pic and wish you good luck

- Liv1234

I remember the formula, I'm just trying to remember how to put the numbers in. And thanks! (:

- Liv1234

6-2/11-12?

- anonymous

:)

- Mehek14

|dw:1443210781657:dw|

- Liv1234

11-12/6-2?

- Liv1234

Would the answer be A? -1/4? And could you help me with a similar one just to make sure I did it right?

- Mehek14

correct and sure

- Liv1234

Thanks!

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- Mehek14

what did you get?

- Liv1234

I'm putting the numbers into the formula right now to see.

- Liv1234

-1-1/-3-6?

- Liv1234

I think the answer is undefined.

- Mehek14

-1 - (-1)/ -3 - 6

- Liv1234

0/-9

- Mehek14

-1 - (-1) = 0
-3 - 6 = -9

- Liv1234

So, is the answer zero?

- Mehek14

yup
undefined = when the denominator = 0

- Liv1234

Thanks! Could you help me with another one?

- Mehek14

yup

- Liv1234

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- Liv1234

Is the formula for slope intercept form "A + B = C"

- Mehek14

\(\bf{y=mx+b}\)
m = slope
b = y-intercept

- Liv1234

I'm having trouble deciding what the line goes through :/

- Mehek14

ok so look at the y-intercept
at what point does it cross the y-axis?

- Liv1234

At 2?

- Mehek14

so b = 2
\(\bf{y=mx+2}\)

- Mehek14

so either C or D

- Mehek14

both have the slope 2

- Mehek14

but 1 is -2
one is 2

- Liv1234

I think it's C because it's in the negative

- Mehek14

line is going up

- Liv1234

So, D? Because since the line is going up, it has to be in the positives?

- Mehek14

so postive

- Mehek14

yes D

- Liv1234

Can you help me with another one? I appreciate your help.

- Mehek14

ok

- Liv1234

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- Liv1234

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- Mehek14

change to y =mx + b
\(\bf{y=5x-3}\)

- Mehek14

y-intercept -3
so A or B

- Mehek14

positive slope so B

- Mehek14

I mean A

- Liv1234

So the answer is A? And can you help me with one more, I promise it's the last one.

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