Mathematics
8 Online
OpenStudy (anonymous):
Find the slope intercept form:
x intercept 2
y intercept 2/3
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hartnn (hartnn):
for slope intercept form y=mx+c, u need c=y-intercept = 2/3
and u need slope=m=?
do u know how to find m ?
OpenStudy (anonymous):
change in y
change in x
???
hartnn (hartnn):
to be precise
m= - y-intercept / x-intercept
can u find m now ?
OpenStudy (anonymous):
2/3 / 2 ?
hartnn (hartnn):
don't forget - *minus* sign
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OpenStudy (anonymous):
Why is there a negative?
OpenStudy (anonymous):
-2/3 /2 Where does the negative come from?
hartnn (hartnn):
hmmm.... to get x-intercept, u put y=0 right ?
in y=mx+c, if u put y=0, u get
0=m(x-int)+(y-int)
so m= -(y-int)/(x-int)
hartnn (hartnn):
got that ^ ?
OpenStudy (anonymous):
Uhhmmm, No?
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OpenStudy (anonymous):
then the intercept is -1/3?
hartnn (hartnn):
*slope* = m= -1/3
OpenStudy (anonymous):
I think I am making this harder than it is. You showed a new way of doing this. Thank you!
hartnn (hartnn):
but did u get the equation ?
OpenStudy (anonymous):
m=-(y-int)/(x-int)
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hartnn (hartnn):
that is just m=-1/3. equation : y=mx+c
y= (-1/3)x + 2/3
u can simplify this.
OpenStudy (anonymous):
-1x?
hartnn (hartnn):
by multiplying by 3 , u get
3y=-x+2
or
x+3y=2
got it ?
OpenStudy (anonymous):
I guess not. Where did the 3 come from?
hartnn (hartnn):
because the fraction had denominator 3, to eliminate that, i multiply 3 on both sides....
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OpenStudy (anonymous):
Ohhhh got it
hartnn (hartnn):
finally !
good :)
OpenStudy (anonymous):
Thanks for your patience.