book Maths Puzzle Numerical Ability

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List all of the potential rational zeros of the polynomial function.Do not attempt to find the zeros. f(x)

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book Other Question

Please help me solve this problem for a: 6/15x4/a a=

What I have tried: 24/15a=8/5a

Thank you, KAyla
Write an equation in slope intercept form satifying the given conditions:

passes through (-4,7) and (2,4)