exam Maths Puzzle Numerical Ability

Hello,
Can you please help me find the slpe of the line through each pair of points.
(-5,6), (-2,9)
Thank you,

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exam Other Question

I am haveing trouble with this one.

For Richter scale R=log A/P

Find the measure to the nearest tenth, of an earthquake on the Richter scale with amplitude of 2,500 and period of .06.

Thanks!
f(x)=[x-3]