book Maths Puzzle Numerical Ability

Write an equation in slope intercept form satifying the given conditions:

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

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book Other Question

I am having some difficulty with this problem...
Could you please help?
List all of the potential rational zeros of the polynomial function.Do not attempt to find the zeros. f(x) If -1 is the midpoint of a segment that is four units long, what numbers determine the endpoints of a segment?