UPSKILL MATH PLUS

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1. Show that the points are collinear: \((-3,-4)\), \((7,2)\) and \((12,5)\).
 
Answer:
 
Slope of \(AB =\) ii.
 
Slope of \(BC =\) ii.
 
Therefore, the given points are .
 
2. If the three points \((3,-1)\), \((a,3)\) and \((1,-3)\) are collinear, find the value of \(a\).
 
Answer:
 
The value of \(a =\) .
 
3. The line through the points \((-2,a)\) and \((9,3)\) has slope \(\frac{-1}{2}\). Find the value of \(a\).
 
Answer:
 
The value of \(a =\) ii.