exam Maths Puzzle Numerical Ability

Find the slope, if it exists of the line containing the pair of points
(2, 5) and (3, -9)
The slope m = ?
Will someone please help me with this I do not understand.

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exam Other Question

write a polynomial function with the given zeros.
1.2,3,-3,1
2.0,-8,2
3.-10,0,2
a lollipop-manufacturing plant can produce 1,200 lollipops in one hour, and the plant receives $0.10 for every lollipop created. for every hour that the plant is operating , 10 emp