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Find the x and y intercepts
3x - 6y = 12
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you make one of the variables 0 and then solve for the other
childs play |
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AluminumXJoin Date: 2011-09-04
Post Count: 17997 |
>7th grade math concepts
anyways i haven't done this in a long time so let me take a crack at it
umm
i totally forgot
#Code Original Signature |
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3x - 6y = 12
6y = 3x-12
y = 0.5x - 2
y intercept -2
x intercept 4 |
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I'm asian but math is such a challenge. |
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I see people on roblox's forums are smarter than what I thought
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"3x - 6y = 12"
3(0) - 6y = 12
-6y = 12
y = -2 |
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oh i was supposed to find x as well
3x - 6(0) = 12
3x = 12
x = 4 |
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CasioMJoin Date: 2015-08-06
Post Count: 6673 |
I forgot all of this
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Disregarding your assignment, it depends on the type of mathematical concepts that you are working with.
Equations in elementary "Algebra" differ significantly from groups proposed in Group-Theory. |
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I'm great at finding the stuff for the equation, but not for intercepts, never got taught that. |
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What is an intercept? It is a point on the x or y axis. The x-axis always has y = 0 and the y-axis always has x = 0.
All coordinates look like this (x,y)
for the x axis it will be (x,0)
For the y axis it will be (y,0)
To solve the problem set the variables in the equation to 0 depending on what you want to find.
Isolate y
3x - 6y = 12
6y = 3x-12
y = 0.5x - 2
set x to 0
y = (0.5) x (0) - 2
y = -2 when x = 0
(0,-2) is the y axis.
Isolate x
3x - 6y = 12
3x - 6(0) = 12
3x = 12
x = 4
When y = 0, x = 4
(4,0) is the x axis. |
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WradifiedJoin Date: 2014-09-07
Post Count: 665 |
I forgot about this now my brain hurts |
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"Isolate y
3x - 6y = 12
6y = 3x-12
y = 0.5x - 2
set x to 0"
could you not just skip right to setting x to 0 instead of isolating the variable |
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There is more than one way to do it I was just giving people a strategy. |
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"There is more than one way to do it I was just giving people a strategy."
oh i see |
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They will need to isolate variables for harder problems like finding the inverse of a function.
Find the inverse of
f(x) = 9e^5x
y = 9e^5x
switch x and y
x = 9e^5y
x/9 = e^5y
ln(x/9) = 5y
y = [ln(x/9)]/5
f^-1(x) = [ln(x/9)]/5 |
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