Math

What's the rule the function machine using, input 22,output 12,input 23,output 16,input 24,output 20,input 25,output24,input 26,output 28

asked by Anonymous
  1. in 22 23 24 25 26 <--- the x's
    out12 16 20 24 28 <--- the y's

    did you notice that for every increase of 1 in your x, the y increases by 4 ?

    so we have y = 4x + b
    plug in (22,12)
    12 = 4(22) + b
    b = -76

    rule: y = 4x - 76

    test it for some of the given values, it works!

    posted by Reiny

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