Question

em cada caso calcule o coeficiente angular e linear da reta que passa pelos pontos dados : a - (1,0) e (-2,0) b (1,2) e (2,1) c (1,-1) e (2,-3)

Answer 1

(1,0) e (-2,0)                                  coef.angular

a = 0 - 0 ==> a = 0 ==> a = 0
      -2 - 1           - 3
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a = 0  e  P (1,0)                                  coef.linear

y = ax + b ==> 0.1 + b = 0 ==> b = 0
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 b (1,2) e (2,1)                             coef.angular

a = 1 - 2 ==> a = - 1 ==> a = - 1
      2 - 1                 1
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a = - 1  e  P (1,2)                                coef.linear

y = ax + b ==> (-1).1 + b = 2 ==> b = 1 + 2 ==> b = 3
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c (1,-1) e (2,-3)               coef. angular

a = - 3 - (-1) ==> a = 3+1 ==> a = 4
        2 - 1                   1
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a = 4  e  P (1,- 1)                                      coef. linear

y = ax + b ==> 4.1 + b = - 1 ==> b = - 1 - 4 ==. b = - 5 
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