Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Math & Sciences (https://www.askmehelpdesk.com/forumdisplay.php?f=402)
-   -   Slope-intercept form (https://www.askmehelpdesk.com/showthread.php?t=364200)

  • Jun 12, 2009, 10:47 AM
    lesliepoo
    slope-intercept form
    Find an equation for the line containing the points P = (4, 2) and Q = (- 6, 10). Write the equation using the slope–intercept form.
  • Jun 12, 2009, 10:57 AM
    Unknown008

    First, find the gradient, given by m,



    Then, use the equation formula,



    Where y_o and x_o are points that you already have, that is you use (4, 2) or (-6, 10), then cross multiply. Make y the subject of formula, and you're done! :)
  • Jun 12, 2009, 10:58 AM
    Perito

    The slope-intercept form of a line is an equation for that line in this form



    where m is the slope of the line and b is the intercept.

    You have two points, (4,2) and (-6,10). You can draw a line between them. The slope of the line is



    Now you have the slope. The line becomes



    To solve for b (the y-intercept), simply take one of your points and plug it into the equation say, (X,Y) = (4,2). Check by inserting the second point.

  • All times are GMT -7. The time now is 09:47 AM.