anonymous
  • anonymous
Plz Help!! Find the slope of a line on a graph (-2,-1), (-4,4)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@dan815
anonymous
  • anonymous
i know u gave me the formula i dont understand it though
anonymous
  • anonymous
you can totally do this! \[\frac{ y-y_1 }{ x-x_1 }\] just plug in the numbers...

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anonymous
  • anonymous
um....i cant lol im not smart
anonymous
  • anonymous
(-2,-1) and (-4, 4)...let's start with what are your y-coordinates?
anonymous
  • anonymous
coordinates/ordered pairs are always written as (x,y).
anonymous
  • anonymous
1 and 4
anonymous
  • anonymous
check again...negatives matter
anonymous
  • anonymous
-1,4?
anonymous
  • anonymous
bingo! ok, so let's plug that in...\[\frac{ y-y_1 }{ x-x_1 }=\frac{ -1-4 }{ x-x_1 }\]
anonymous
  • anonymous
now let's figure out our x-coordinates...
anonymous
  • anonymous
then -2,4
anonymous
  • anonymous
your coordinates are (-2,-1) and (-4,4) so I agree with -2 being an x-coordinate, but what's the first number in the 2nd set of coordinates?
anonymous
  • anonymous
@Whalexnuker
anonymous
  • anonymous
-4
anonymous
  • anonymous
ok, so this is the tricky part...
anonymous
  • anonymous
\[\frac{ -1-4 }{ -2--4 }\]
anonymous
  • anonymous
do you see how -1 is the first number on top and -2 is the first number on the bottom? That's because those 2 numbers go together (-2,-1)
anonymous
  • anonymous
there is only one -4
anonymous
  • anonymous
ya
anonymous
  • anonymous
the denominator (bottom) says -2 minus -4
anonymous
  • anonymous
oh lol srry
anonymous
  • anonymous
it's ok :) do you know how to subtract negative numbers?
anonymous
  • anonymous
ya
anonymous
  • anonymous
-6
anonymous
  • anonymous
after this i have one more
anonymous
  • anonymous
-2-(-4) isn't going to equal -6. that would be true if you were adding, but you're subtracting.
anonymous
  • anonymous
subtracting a negative is like adding a positive...so instead of -2-(-4) think -2+4
anonymous
  • anonymous
oh so then 2
anonymous
  • anonymous
perfect, what about the top number?
anonymous
  • anonymous
-1-4
anonymous
  • anonymous
-5
anonymous
  • anonymous
so put it all together and you have your slope! -5/2
anonymous
  • anonymous
thnk you so much
anonymous
  • anonymous
you are so very welcome! I wish I could stay and help more, but I have work in the morning. Good luck on the rest of your problems!

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