Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

yrivers36

Write the slope intercept form of a line passing through (-1,4) and (2,-2)

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    what do you get when you subtract one point from the other?

    • 2 years ago
  2. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    hard to have a conversation when they vanish; but it could be a bad connection ontheir end i spose

    • 2 years ago
  3. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    subtract your points and stack y/x for slope: m then pick either point (Px,Py) and construct the equation: y = mx -mPx + Py

    • 2 years ago
  4. yrivers36
    Best Response
    You've already chosen the best response.
    Medals 0

    The answer that I came up is y=3x+1. The teacher says its y=2x+2

    • 2 years ago
  5. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    (-1,4) -( 2,-2) ------ -3,6; slope = y/x = 6/-3 = -2 y = -2x +2(-1)+4 = -2x -2+4 = -2x + 2

    • 2 years ago
  6. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    youre teachers is closest :)

    • 2 years ago
  7. yrivers36
    Best Response
    You've already chosen the best response.
    Medals 0

    im still unsure. going over your answer

    • 2 years ago
  8. yrivers36
    Best Response
    You've already chosen the best response.
    Medals 0

    isn't the formula y1-y2/x1-x2

    • 2 years ago
  9. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    we can test it out to BE sure: y = -2x + 2 ; try out (-1,4) 4 -1 ----------- 4 = 2 + 2 ; thats good y = -2x + 2 ; try out (2,-2) -2 2 ---------- -2 = -4+2 thats good as well

    • 2 years ago
  10. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    the formula is just a compact way to write the steps, you still have to do the steps. P(x1 , y1) -Q(x2 , y2) ------------ (x1-x2, y1-y2); slope = y/x = (y1-y2)/(x1-x2) but even that is misleading because it doesnt matter which point you start with

    • 2 years ago
  11. yrivers36
    Best Response
    You've already chosen the best response.
    Medals 0

    m=-2-4[\div-2-1\] and I came up with -6/2 =-3

    • 2 years ago
  12. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    your not keeping track of your numbers to well, which happems to me when i try this horizontal conflagerations. I always do a vertical format so that i dont mix up numbers

    • 2 years ago
  13. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    if we do "the formula" m = (4--2)/(-1-2) = 6/-3 = -2 or m = (-2-4)/(2--1) = -6/3 = -2

    • 2 years ago
  14. yrivers36
    Best Response
    You've already chosen the best response.
    Medals 0

    ooohhh I see what i did. I didn't change my negative to a positive

    • 2 years ago
  15. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    :) good catch

    • 2 years ago
  16. yrivers36
    Best Response
    You've already chosen the best response.
    Medals 0

    oh ok I got it...thank you so much for your help

    • 2 years ago
  17. amistre64
    Best Response
    You've already chosen the best response.
    Medals 1

    youre welcome :)

    • 2 years ago
    • Attachments:

See more questions >>>

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.