anonymous
  • anonymous
I need help with a slope and y intercept problem
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • 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
  • anonymous
Hmm. what was the original problem asking you to do or find?
anonymous
  • anonymous
the slope and the y intercept of the line

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anonymous
  • anonymous
What information were you given?
anonymous
  • anonymous
-7=1/2y
anonymous
  • 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
  • anonymous
yes
anonymous
  • anonymous
is it -7 = (1/2) * y or -7 = 1/(2y)?
anonymous
  • anonymous
-7=1/2y that is all it gives. no ()
anonymous
  • anonymous
Is the y in the numerator or denominator?
anonymous
  • anonymous
it is a fraction with y beside the line
anonymous
  • anonymous
i really appreciate you helping me
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
So that means that y is being multiplied by (1/2), one-half
anonymous
  • anonymous
yes
anonymous
  • 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
  • anonymous
OK, so how do I clear the fraction or do I?
anonymous
  • 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
  • anonymous
why by 2 what happened to the fraction
anonymous
  • anonymous
sorry I'm not good with this
anonymous
  • anonymous
Oh ok.
anonymous
  • 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
  • anonymous
5
anonymous
  • anonymous
Not quite.
anonymous
  • anonymous
I didn't give you the money yet.
anonymous
  • anonymous
20
anonymous
  • anonymous
oh
anonymous
  • anonymous
Yeah.
anonymous
  • 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
  • anonymous
2000
anonymous
  • anonymous
Exactly
anonymous
  • anonymous
You just solved "(1/2)* y = 1000"
anonymous
  • anonymous
To solve (1/2)*y = -7 for y, it's the same idea
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
if I have +7 and divide by 2?
anonymous
  • anonymous
No, when we solved for y, what did you do to the 1000? You multiplied by 2.
anonymous
  • anonymous
So if (1/2) * y = -7, then to solve for y, we should multiply -7 by 2
anonymous
  • anonymous
makes it -7/2
anonymous
  • anonymous
If I moved the -7 to the other side of the = sign don't that make it +
anonymous
  • anonymous
Well, when we multiply 7 by 2, we get 14. So multiplying -7 by 2 gives us -14.
anonymous
  • anonymous
you lost me
anonymous
  • anonymous
No, that's only if you're adding the -7 to the other side.
anonymous
  • anonymous
I thought that is what I had to do to get y=mx + B
anonymous
  • anonymous
Oh, I can see why you're confused.
anonymous
  • anonymous
If A = B, then B = A.
anonymous
  • anonymous
So if -7 = (1/2) * y, then (1/2) * y = -7.
anonymous
  • 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
?
anonymous
  • anonymous
I thought when you moved it to the other side of the = you had to add or subtract it?
anonymous
  • 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
  • anonymous
ok thanks for trying
anonymous
  • anonymous
But does it make sense to you that if A = B then B = A?
anonymous
  • anonymous
yes
anonymous
  • anonymous
What about if A = -7, then -7 = A?
anonymous
  • anonymous
ok
anonymous
  • anonymous
hello every1
anonymous
  • anonymous
cm on chat box
anonymous
  • anonymous
good luck karebear
anonymous
  • anonymous
thanks

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