Gcse maths question

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  1. emma363's Avatar
    1 06-05-2010  20:54
    • Exalted and Worshipped Member
    Gcse maths question
    t = a√s + b

    I've got the values
    s=2.8 when t=7.2
    s=4.6 when t=8.7
    s=12.4 when t=13.1

    I've got the find the values of a and b by drawing a graph, but i've drawn one and i'm still none the wiser >.<
    any help please?
  2. abbii's Avatar
    2 06-05-2010  20:59
    • Benevolent Member
    • Posts: 831
    Re: Gcse maths question
    b=point line crosses y axis
    a=gradient
    when you plot a graph of t against √s
  3. IDGAF's Avatar
    3 06-05-2010  21:00
    • Full Member
    • Location: London
    • Posts: 101
    Re: Gcse maths question
    b = t intercept

    a = gradient
  4. shawrie777's Avatar
    4 06-05-2010  21:00
    • Full Member
    • Posts: 140
    Re: Gcse maths question
    Did you plot t against s? you should use t against root s
  5. emma363's Avatar
    5 06-05-2010  21:04
    • Exalted and Worshipped Member
    Re: Gcse maths question
    Ah! I've plotted the graph wrong, thanks all :P
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