#A guy(me) who is a bit slow needs help with something

20 messages · Page 1 of 1 (latest)

analog wren
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Context:

I got 60% on a test (yeah I know I suck at math), and I need help to get the bump-up marks.

(note: this isn't cheating as the test is already marked, and she encouraged her students to get others to help correct their tests to do this bump up, and she never stated that I couldn't use social media or the internet for help, the only difference is that I'm asking people online instead of in person).

FULL QUESTION: "A triangle has vertices D(-8,4), E(7,4), and F(1,-2). Determine the equation of the median from vertex D."

So during question 5, I had to solve the median of a triangle on vertex D, anyways when I got to solving the median, this is what I wrote:
M= (y2-y1)/(x2-x1)

= (4-1)/(-8-4)

M=3/-12

I could see how this could be reduced to 1/-4, but she wrote -1/4 as the correct answer. How does that make sense? Last time I checked, 4-1 is 3, and -8-4 is -12.

I still have to correct the rest of the equation :/ but first, I need to figure out how 3/-12 turns into -1/4

mental idolBOT
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mossy salmon
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its cause $\frac{a}{-b}=-\frac{a}{b}$

spark quiverBOT
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flying green people eater

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analog wren
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huh

mossy salmon
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also teacher should NOT be taking points off for that

analog wren
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she took off a whole point

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me need those points for passing

mossy salmon
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wth

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anyways

mossy salmon
analog wren
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anyways I'ma try to solve the rest of the equation, I'm not sure if I can leave this up, I still need to solve the rest of this first.

mossy salmon
analog wren
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So I solved the question now,

Since D is (-8,4) and the slope(m) is -(1/4), I now have to solve for b and here is my work

y= -(1/4)x+b

(4) = -(1/4)*-(8/1)+b

4 = -(8/4)+b
4 = 2+b
-2+4= b
b=2

full equation y = -(1/4)+2, does this look correct?

mossy salmon
analog wren
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thank you