exam Maths Puzzle Numerical Ability

find the slope of the line that passes through (5,2)and (8.,-1)

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exam Other Question

Graph the function.

f(x) = -2 - 5

I am not quite understanding the function concept or graphing it. Please help! Thank you! I am not sure how to do this problem. Thanks for your help!
Problem:
[((x+1 / x-1)+1) / ((x+1 / x-1)-1)]^5
What I have come up with:
[((x + 1/x -1)+1)*((x-1/x+1)-1)]^5

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