Math

If you have the following points for X and Y what is the linear function rule?

x = 4, 1

y = 2, -4

I think it is 1/2 x but I'm not sure if it is +6 or - 6

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asked by steve
  1. y = mx + b
    f(x) = 4m + b = 2
    f(x) = m + b = -4

    4m + b = 2
    -m -b = 4

    3 m = 6
    m = 2

    4(2) + b = 2
    8 + b = 2
    b = -6

    y = 2x - 6

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    posted by Kuai
  2. thank you

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    posted by steve

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