exam Maths Puzzle Numerical Ability

Could someone help me answer this problem?
Find the slope of the line that passes through the points (-3,5) and (0,-2)
Thanks to all!

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exam Other Question

Factoring Polynomials -

Please factor the following:

w4 - 8w2 - 9
please simplify:

4 over ax+ay-bx-by minus 3 over a-b...<all of this OVER

2 over a-b plus 2 over x^2 + xy

so it should look like:

4.....................3
-------- minus