exam Maths Puzzle Numerical Ability

What is the point-slope equation for the line that contains these points?
The line contains the points (-3,4) and (2,5)

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Last question for now please and thank you. Given two points (-1,-5) and (-5,-4) how would I write the standard form of that first using point slope form?

Thanks! What age is a boy now if his mother is 12 times his age and in 20 years she will be twice his age?