anonymous
  • anonymous
Medal given! Please help me answer:
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Find the slope of (a) |dw:1365962439060:dw| 1. A(-2, 0) and B(4,4)
anonymous
  • anonymous
I guess just find the slope of A(-2,0) and B(4,4)
anonymous
  • anonymous
\[\huge slope_{AB}=\frac{y_B-y_A}{x_B-x_A}\]

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anonymous
  • anonymous
The answer is 2/3. How do they get this?
anonymous
  • anonymous
if you use the formular on top taking the difference in y coordinates and the differnce in the x cordintaes you get the slope-
anonymous
  • anonymous
So YB is 4 right? so i 4-0=4. and then for x its, 4-(-2)= 6. So 4/6?
anonymous
  • anonymous
and then you divide right?
anonymous
  • anonymous
so is 0.6666666667 2/3?
anonymous
  • anonymous
@Jonask
anonymous
  • anonymous
So now that i know the slope is 2/3, how can i tell if anything is parallel to line AB? And then how can i tell what is perpendicular to line AB
anonymous
  • anonymous
parrallel means same slope so if a line \[l\] is parrallel and its gradient (slope)is \[\huge m_l\] then \[\huge m_l=m_{AB}\] for perpendicular\[\huge m_{l}m_{AB}=-1\]

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