spidergirl51
(-3 and 4) and (3,-4) find the slope
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zaynahf
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Use slope formula:
\[m = \frac{ y _{2}- y _{1} }{ x _{2}-x _{1} }\]
Using the points:
(-3 and 4) and (3,-4)
\[y _{2}= -4, y _{1}= 4\]\[x _{2}= 3 , x _{1}= -3\]
spidergirl51
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i did
zaynahf
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What did you get?
spidergirl51
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i got -4/3
spidergirl51
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|dw:1357701162432:dw|
zaynahf
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Ok start with the top: what is -4 -4?
spidergirl51
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-8
ChmE
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why is that not right. looks good to me
zaynahf
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And the bottom?
spidergirl51
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6
spidergirl51
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then isimplifed
spidergirl51
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i need the y intercept as well
zaynahf
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Im sorry.. i forgot to reduce it.. you were right. It is -8/6, or -4/3
zaynahf
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Then you need to use point slope form
spidergirl51
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oh
spidergirl51
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hmm
spidergirl51
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idk
zaynahf
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\[y - y _{1}= m ( x - x _{1})\]
spidergirl51
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i know that
spidergirl51
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i dont know how to solve it
zaynahf
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Now plug in the points and the slope
spidergirl51
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so
spidergirl51
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y-4=-4/3(x-3)
spidergirl51
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right
zaynahf
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Which point did you use?
spidergirl51
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-3 and 4
spidergirl51
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(-3,4)
zaynahf
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Ok for the last part, it would be x + 3 because of hte double negative
spidergirl51
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oh okay then wat
zaynahf
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Now distribute the right side, and isolate the y
spidergirl51
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can u help me with it
zaynahf
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Do you know how to distribute?
spidergirl51
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yes
i got -4/3x-4
spidergirl51
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when i distrubute
zaynahf
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Ok, now carry over the # on the left
spidergirl51
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what u mean can ushow me
zaynahf
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y - 4 = -4/3x - 4
+4 +4
------------------
Solve that
spidergirl51
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its o
zaynahf
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Y-int, right?
spidergirl51
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yeah
zaynahf
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Then you're done
spidergirl51
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thanks