exam Maths Puzzle Numerical Ability

hello

how do you figure the slope of any line that is perpendicular to the line through

(-3, 5) and (4,-6)

Tks!

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exam Other Question

Solve:

8x-10=2x
y=- x-2 -2
There are brackets in front of the x and behind the -2. So how would I graph the equation.