I need help with a slope and y intercept problem

- anonymous

I need help with a slope and y intercept problem

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- anonymous

-7=1/2y I have moved the -7 over to the other side of the = and made it positive, but what do I do next?

- anonymous

Hmm. what was the original problem asking you to do or find?

- anonymous

the slope and the y intercept of the line

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## More answers

- anonymous

What information were you given?

- anonymous

-7=1/2y

- anonymous

Hmm.. ok. That's really weird. They want you to find the slope and y-intercept given that the line satisfies -7 = (1/2) y?

- anonymous

yes

- anonymous

is it -7 = (1/2) * y or -7 = 1/(2y)?

- anonymous

-7=1/2y that is all it gives. no ()

- anonymous

Is the y in the numerator or denominator?

- anonymous

it is a fraction with y beside the line

- anonymous

i really appreciate you helping me

- anonymous

oh ok

- anonymous

So that means that y is being multiplied by (1/2), one-half

- anonymous

yes

- anonymous

Ok, that's the same as y being in the numerator, or the top, of the fraction, but it's different than y being in the bottom of the fraction

- anonymous

OK, so how do I clear the fraction or do I?

- anonymous

Anyways, we want to solve for y by itself to get the equation of the line
in “point-slope form”
Solving for y by itself, we see that y = -14, after multiplying both sides by 2.

- anonymous

why by 2 what happened to the fraction

- anonymous

sorry I'm not good with this

- anonymous

Oh ok.

- anonymous

So suppose I said, I have some money in my bank account, and if I gave you half of that, you would have 10 dollars. So how much do I have right now?

- anonymous

5

- anonymous

Not quite.

- anonymous

I didn't give you the money yet.

- anonymous

20

- anonymous

oh

- anonymous

Yeah.

- anonymous

So if I said I have money in my account. If I gave you half, you would have 1000. So how much money do I have?

- anonymous

2000

- anonymous

Exactly

- anonymous

You just solved "(1/2)* y = 1000"

- anonymous

To solve (1/2)*y = -7 for y, it's the same idea

- anonymous

oh ok

- anonymous

if I have +7 and divide by 2?

- anonymous

No, when we solved for y, what did you do to the 1000? You multiplied by 2.

- anonymous

So if (1/2) * y = -7, then to solve for y, we should multiply -7 by 2

- anonymous

makes it -7/2

- anonymous

If I moved the -7 to the other side of the = sign don't that make it +

- anonymous

Well, when we multiply 7 by 2, we get 14. So multiplying -7 by 2 gives us -14.

- anonymous

you lost me

- anonymous

No, that's only if you're adding the -7 to the other side.

- anonymous

I thought that is what I had to do to get y=mx + B

- anonymous

Oh, I can see why you're confused.

- anonymous

If A = B, then B = A.

- anonymous

So if -7 = (1/2) * y, then (1/2) * y = -7.

- anonymous

We didn't "move 7 to the other side of the equation" by adding it, we just rewrote the equation with the y on the left side and the 7 on the right.

- anonymous

?

- anonymous

I thought when you moved it to the other side of the = you had to add or subtract it?

- anonymous

I have to go soon. It looks like you need extra help. I don't think this site is good for you if you need more help one-on-one tutoring.

- anonymous

ok thanks for trying

- anonymous

But does it make sense to you that if A = B then B = A?

- anonymous

yes

- anonymous

What about if A = -7, then -7 = A?

- anonymous

ok

- anonymous

hello every1

- anonymous

cm on chat box

- anonymous

good luck karebear

- anonymous

thanks

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