exam Maths Puzzle Numerical Ability

Good Evening,
What is the slope of any line that is perpendicular to the line through (-3,5) and (4,-6)?
Thank you.

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exam Other Question
May I please have some help with equation: h/4 = -16 One factor of f(x)=x^3+x^2-22x-40 is x+4. Find the other factors.