If the points A(-2,-5), B(2,-2) and C(8,a) are collinear , then a =
A. `-5//2`
B. `5//2`
C. `3//2`
D. `1//2`
A. `-5//2`
B. `5//2`
C. `3//2`
D. `1//2`
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Correct Answer – B
Since A,B,C are collinear points .
`therefore ` Slope of AB=Slope of AC `implies (3)/(4)=(a=5)/(10)implies a=(5)/(2)`