Question

if (1,2),(-1,b),(-3,-4) are collinear then b =​

Answer 1

Answer:b=-1

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Answer 2

ANSWER

b = -1

CALCULATION

• collinear means that these point lie in same line
• let these points are A, B, C
• for collinearity AC = AB +BC But this method is long if in question it is specify then you use thisethod .generally this method is to prove collineraty then you use this method

method use for school type if question

• we know how to calculate area of triangle
• triangle is polygon with three sides let these 3 sides are AB, BC, AC
• calculate area by applying shoalace formula
• you get your answer

SEE ATTACHMENT FOR CALCULATION

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