Mathematics
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OpenStudy (anonymous):
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OpenStudy (anonymous):
OpenStudy (anonymous):
@Mertsj
OpenStudy (mertsj):
I thought we did this yesterday.
OpenStudy (anonymous):
@Mertsj i don't think we did
OpenStudy (mertsj):
Direct variations are of the form y = k x where k is a constant.
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OpenStudy (mertsj):
In the case of a line, we call k the slope and name it m. So we see that a line that is in y = mx+b form and where b is 0 is a direct variation.
OpenStudy (anonymous):
@Mertsj ok
OpenStudy (mertsj):
Is the y intercept of your line 0?
OpenStudy (anonymous):
@Mertsj no?
OpenStudy (mertsj):
Where does your line cross the y axis?
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OpenStudy (anonymous):
@Mertsj 0
OpenStudy (mertsj):
The y intercept is the point where the line crosses the y axis. So what is your y intercept?
OpenStudy (anonymous):
@Mertsj it would be 0
OpenStudy (mertsj):
So it is a direct variation since the y intercept is 0 and it is a line.
OpenStudy (mertsj):
What is the slope (which is the constant of variation)?
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OpenStudy (anonymous):
@Mertsj 2/3
OpenStudy (mertsj):
The line is falling.
OpenStudy (mertsj):
So that means that the slope is negative
OpenStudy (anonymous):
@Mertsj oh so its-3/2
OpenStudy (mertsj):
the change in y goes on top
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OpenStudy (anonymous):
@Mertsj i dont know what you mean
OpenStudy (mertsj):
slope is rise over run
OpenStudy (anonymous):
@Mertsj yes, so then you go down 4 and run 6
OpenStudy (anonymous):
@Mertsj simplified would be -3/2 right?
OpenStudy (mertsj):
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