book Maths Puzzle Numerical Ability

What is the slope of the points (4,2) (-5,2)

i got 0/-9.. do i leave it that way or is the slope 0??

Thanks Caroline

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please help me with this problem
solve for x

x=3/x+1

this is what i have so far
x(x+1)=3
(x+3)(x-1)=0
? Is there a way to find out how stretchable a rubber is eg rubber band? If so, how do I do that? Thank you