exam Maths Puzzle Numerical Ability

Find th equation of the line containing the given pair of points.
Can some one please help me with this one too. I am not sure how I am supposed to do fractions either...

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exam Other Question

for the function y= 1/x-2 give the values y for x = -1,0,1,2,3,4

please show work to help me understand this problem

using these points draw a curve
Find the product: (x - 1)(x-2)(x + 3)