A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Ok, so I am trying to solve this equation of a line given a point and a slope: m=3/2 (-6,4) I get y=3/2x+13, the answer is supposed to be -3x+2y=26. I am stumped. I used the y-y1=m(x-x1) formula.

  • This Question is Closed
  1. sid1729
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You are correct, your answer is correct but in a different form \[y = \frac{3}{2}x + 13\] Multiply by two on both sides \[2y = 3x + 26\] Subtract 3x from both sides \[-3x + 2y = 26\]

  2. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I hate that formula, never made any sense to me to use a different formula when you got a perfectly good one with y=mx+b You know you "m" and your given your x=-6 and y=4; now solve for "b". 4 = (3/2)(-6) + b 4 = -9 + b 13 = b now throw away your values for y and x and you get y = (3/2)x + 13 -(3/2)x + y = 13 Or if you want integers multiply everything by 2 -3x + 2y = 26

  3. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks sid1729 and amistre64. I think I understand better now. I didn't consider or recognize that the answer I had was the same as the given answer, only in a different form. I don't see why they mess with the y=mx+b form either. It gives ya good practice at manipulating equations, but that is about it, as I see it.

  4. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.