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Mathematics 7 Online
OpenStudy (pixiedust1):

=

OpenStudy (wolfe8):

'Tis not attached yet

OpenStudy (pixiedust1):

Silly me

OpenStudy (wolfe8):

First, rearrange the equation into the form y=mx+b

OpenStudy (pixiedust1):

Okay

OpenStudy (pixiedust1):

What's y=mx+b?

OpenStudy (wolfe8):

That is the general form. Compare your equation to it and rearrange so that you have the y, x, and constant(b) where they should be.

OpenStudy (pixiedust1):

Oh okay! 2x-3y=6?

OpenStudy (wolfe8):

Close. You will need only the y on the left side. The rest are on the right side.

OpenStudy (pixiedust1):

Oh okay! so -3y=2x+6?

OpenStudy (wolfe8):

Close. But note that you want a positive y.

OpenStudy (pixiedust1):

Oh lol 3y=2x+6?

OpenStudy (wolfe8):

Um, what did you do to get a positive y? Did you not multiply everything with -1?

OpenStudy (wolfe8):

WAIT A MINUTE

OpenStudy (pixiedust1):

I have no idea what I am doing :( So to answer your question, I was playing the guessing game

OpenStudy (wolfe8):

Daheck did you do lol. Do it step by step please and show me. How do you rearrange the equation?

OpenStudy (pixiedust1):

Hmmmm... I have no idea what I did....

OpenStudy (pixiedust1):

lol

OpenStudy (pixiedust1):

I never really understood how to solve this kind of question :(

OpenStudy (wolfe8):

Well you want a positive y with no constant. So you move -3y to the right and get: 2x=3y+6 Now you move the six to the left 2x-6=3y Now divide everything with 3 2/3x-2=y or y=1/3x-2 Now compare to y=mx+b m is the gradient, and b is the y-intercept

OpenStudy (pixiedust1):

Oh okay! that makes sense! Is that like the "isolate the variable" idea?

OpenStudy (wolfe8):

The what the what? I have no idea. I don't remember names. But can you sketch a graph with that info now?

OpenStudy (pixiedust1):

Lol I always forget names too. :D And sure! Hold on

OpenStudy (pixiedust1):

Me and my sloppy handwriting

OpenStudy (pixiedust1):

Mine looks a heck of a lot like the last option

OpenStudy (wolfe8):

Are you sure that's the x-intercept?

OpenStudy (pixiedust1):

The what?

OpenStudy (pixiedust1):

Oh, that thing we did before?

OpenStudy (pixiedust1):

And thank you for your patients btw

OpenStudy (wolfe8):

x-intercept. Replace y=0 in the equation we obtained and see what x is.

OpenStudy (pixiedust1):

Oh! I just checked my notes, and it say.. x-intercept = the point where the line crosses the x-axis Oh and it ended up being 1/3x-2

OpenStudy (pixiedust1):

I'm a pretty slow learner lol

OpenStudy (wolfe8):

Right, so when the line crosses the x-axis, y should be zero, right? So you replace y with 0 and find x. That is your x-intercept

OpenStudy (pixiedust1):

Oh yeah!! (x,0)

OpenStudy (pixiedust1):

Now it's starting to make sense lol! :D

OpenStudy (pixiedust1):

the little lightbulb has turned on...

OpenStudy (wolfe8):

Um, I told you what to do already. Replace y with 0. So you have 1/3x-2=0 Find x

OpenStudy (pixiedust1):

It's sloppy, but it's representing the y=0 and (2,3)

OpenStudy (wolfe8):

...How did you get (2,3) ?

OpenStudy (pixiedust1):

ignore the old ones, I messed up Actually, I'll delete them

OpenStudy (wolfe8):

Um, this might take longer. Can I come back tonight and see if you still need help? I need to finish my homework first

OpenStudy (pixiedust1):

Maybe 1/3x-2 (1/3x-2 , 0)

OpenStudy (pixiedust1):

So shall i plot that?

OpenStudy (wolfe8):

No... Pixie, look at what I said above. "Um, I told you what to do already. Replace y with 0. So you have 1/3x-2=0 Find x"

OpenStudy (pixiedust1):

Oh! Find x! Okay! 1/3*6-2 x=6!!!

OpenStudy (pixiedust1):

:D

OpenStudy (wolfe8):

YES. THANK YOU! Lol. That's not usually how you solve it but ok. So now you know on the y axis the line intercepts at -2, on the x axis it intercepts at 6. Now you can sketch it

OpenStudy (pixiedust1):

So then the answer would be the last graph?

OpenStudy (wolfe8):

Yes

OpenStudy (pixiedust1):

WOW! THANK YOU SO MUCH! YOU HAVE BEEN AN AWESOME TEACHER TO ME :D

OpenStudy (wolfe8):

Lol you're welcome. Glad to help.

OpenStudy (pixiedust1):

Have a BLESSED day!

OpenStudy (pixiedust1):

As soon as SS is fixed, I'm being your fan and writing you a testimonial

OpenStudy (wolfe8):

Haha thank you. Have a good day yourself and stay warm.

OpenStudy (pixiedust1):

Yes, I'll certainly try to lol

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