Results 1 to 4 of 4

Math Help - Going from Standard form to Slope-Intercept form

  1. #1
    Newbie
    Joined
    Jan 2011
    From
    Minnesota
    Posts
    14

    Going from Standard form to Slope-Intercept form

    First of all I'd like to say if you remember me in particular as being a jerk or an ass, I completely apologize. I was extremely confused at the time.

    But anyways I think I can do this myself but I would like some reassurance. What are the steps of turning 3x + 5y = 30 into Slope intercept form?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,040
    Thanks
    885
    Quote Originally Posted by AbstractHero View Post
    First of all I'd like to say if you remember me in particular as being a jerk or an ass, I completely apologize. I was extremely confused at the time.

    But anyways I think I can do this myself but I would like some reassurance. What are the steps of turning 3x + 5y = 30 into Slope intercept form?
    the key is to isolate y ...

    3x + 5y = 30

    subtract 3x from both sides ...

    5y = -3x + 30

    divide both sides by 5 ...

    y = -\frac{3}{5}x + 6
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2011
    From
    Minnesota
    Posts
    14
    Thank you.

    I always have a hard time figuring out what to do first. If my y is positive, should I remove what is before it? and If it is negative should I switch it around? Or what?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Consider the negative case

    3x - 5y = 30

    Same as skeeter's steps. Take 3x from both sides

    -5y = 30-3x

    Now divide -5 from both sides.

    y=\frac{3x}{5}-6
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Slope Intercept to Standard Form
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: August 11th 2009, 02:30 AM
  2. slope-intercept to standard form
    Posted in the Geometry Forum
    Replies: 4
    Last Post: June 18th 2009, 10:54 PM
  3. Standard form/Slope-intercept form
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 9th 2009, 09:04 PM
  4. Slope Intercept Form
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: January 2nd 2008, 04:30 PM
  5. Help!!!! Slope-Intercept Form
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: May 2nd 2007, 06:34 PM

Search Tags


/mathhelpforum @mathhelpforum