Question

Find the constant b so that the three points a(2 , 3), b(4 , 7) and c(8 ,
b.Are collinear

Answer 1

Answer:

Step-by-step explanation:

using the concept of slope  ,  since the points are collinear.

slope of ab  =  slope of bc

 (7-3)/(4-2)    = ( b-7) / (8 - 4)

  4/ 2     =  (b - 7) / 4

b -7 = 4/2  x4

b-7 = 8

 b = 8+7

    =15

Answer 2

Step-by-step explanation:

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