exam Maths Puzzle Numerical Ability

How can you tell what a negative slope is and a positive sole is?

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exam Other Question

4 2nd power + 2 x 7 � (5 x 4 � 15) x-8/x+5 / x-9/x+4 << considering the following

Explain why -5, 9, and -4 are not allowable replacements for the variable x.