anonymous
  • anonymous
http://prntscr.com/8n6jqs
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Substitute x and y as 2 and 1 and then note down that equation. Do the same with 3 and 4 . What you will then get are simultaneous linear equations in two variables. Solve them for x1 and y1 and then substitute the found values in the original eqaution
anonymous
  • anonymous
would my answer be d?
Astrophysics
  • Astrophysics
Well first find the slope, using the following formula: \[m = \frac{ y_{2}-y _{1} }{ x _{2}-x _{1} }\] where your coordinates represent \[(x_1,y_1)~~\text{and}~~(x_2,y_2)\] Once you manage to get that, plug in m and your first coordinates in the point - slope form: \[y-y _{1}=m(x-x _{1})\]

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anonymous
  • anonymous
y=3x-5?
Astrophysics
  • Astrophysics
Which one from your options?
anonymous
  • anonymous
is my answer d?
Astrophysics
  • Astrophysics
No, please go over what I've said, it will take you 5 minutes to do, rather than wasting time to guess.
anonymous
  • anonymous
m=3
Astrophysics
  • Astrophysics
Yes! Now you have the slope
Astrophysics
  • Astrophysics
Now do the next step
anonymous
  • anonymous
y−1=3(x−2) so my answer is a?
Astrophysics
  • Astrophysics
Yes!
anonymous
  • anonymous
Thnx
Astrophysics
  • Astrophysics
Wasn't that so much better than just guessing? :)

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