candrie
Slope 0 and y intercept (0,6)
equation is y=?
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vf321
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Well, do you know in the equation of a line
\[y=m(x-h)+k\]
what each letter means?
candrie
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its been a long time
vf321
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Well, let's try to figure it out. How about this. Given two points, what's the slope of the line they make?
candrie
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y=mx+b
candrie
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im wrong
vf321
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No... that's an equation for the line. How about you tell me this. If you have
\[p_1=(x, y)\]
and
\[p_2=(h, k)\], then what is the slope s you get between them?
panlac01
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she just gave the slope, so that's a line
candrie
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0
panlac01
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all she has to do is plug it in the slope-intercept formula
vf321
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Hmm... nvm. I was trying to teach, @panlac01 . Plug-n-chug is easy.
candrie
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im working on a test which deadline is by 11pm pst and im desperate for any help i can get
panlac01
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listen to VF
panlac01
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but you almost nailed it, candrie :)
vf321
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Okay, @candrie , when you're at the y-intercept, what's the coordinate pair?
candrie
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math is tough for me
but i am awesome in english and everything else
vf321
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Oh the problem gives it to you. What is the y-intercept pair?
candrie
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0,6?
vf321
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yes
vf321
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Do you agree that the y-intercept is on the line, @candrie ?
candrie
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yes
precal
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|dw:1344737196994:dw|
in the end, remember to connect your final solution to its graph
vf321
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If a point is on a line, then its x and y values, when inserted into the formula you gave,\[y = m x +b\], must hold true.
vf321
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So put in the y-intercept's values into the formula.
candrie
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y=0(0)+6
vf321
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Well, I was trying to get you to say:
6=m(0)+b, so b = 6. But since you know what b and m are already, what's your question?
candrie
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just needed the equation
vf321
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Well it is
y = m x + b. The difference is that my equation is
y = m (x - h) + k
But they're really the same because
y = m x - mh + k
y = m x +(k-mh)
and k-mh =b
panlac01
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y=mx+b
y=0x+6
y=_____
candrie
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y=x+6?
vf321
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Multiply by 0...
panlac01
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anything multiplied to zero is _____
candrie
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0
panlac01
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therefore
y=0x+6 (zero multiplied by x, plus six)
y=_____
panlac01
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the final answer is your equation, the whole thing
candrie
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y=6
candrie
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o wait
candrie
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y=0x+6?
panlac01
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you got it already, but 0x can be further simplified by taking it away of the universe
candrie
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ok
panlac01
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out of the universe
candrie
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my answer will be y=0+6?
precal
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or
y=6
precal
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|dw:1344738155919:dw|
candrie
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yes i figured that after i wrote it
precal
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try to connect the graphs with the information given, it will help you learn the concepts better