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Posted by on Sunday, October 5, 2008 at 9:15pm.

given two points one a line (8,1) and 10,8) find the x intercept and y intercept



PLEASE HELP!

  • algebra HEEEEEEEEEEEEEEEEELPPP!!!!! - , Sunday, October 5, 2008 at 9:19pm

    slope is 7/7 = 1

    so the equation is y = x+b
    but (8,1) lies on it, so
    1 = 8 + b
    b = -7

    your equation is y = x - 7

    clearly the y-intercept is -7 by the definition of y = mx + b
    for the x-intercept, let y=0 and solve for x

  • algebra HEEEEEEEEEEEEEEEEELPPP!!!!! - , Sunday, October 5, 2008 at 9:21pm

    when i did it i got the slope=7/2
    how did you get 7/7?

  • algebra HEEEEEEEEEEEEEEEEELPPP!!!!! - , Sunday, October 5, 2008 at 9:24pm

    you are absolutely right, my mental arithmetic is often pathetic.

    so just follow the rest of my solution with a slope of 7/2

  • algebra HEEEEEEEEEEEEEEEEELPPP!!!!! - , Sunday, October 5, 2008 at 9:30pm

    did you get y-intercept of -27 and
    x-intercept of 54/7 ?

  • algebra HEEEEEEEEEEEEEEEEELPPP!!!!! - , Sunday, October 5, 2008 at 9:44pm

    yes i did!

    thanks so so much

  • algebra HEEEEEEEEEEEEEEEEELPPP!!!!! - , Tuesday, February 24, 2015 at 7:44pm

    564

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