exam Maths Puzzle Numerical Ability

what is the slope of a line perpendicular to the equations below?

A. y= -2/3x + 4

B. y= 3x

C. 3x - 2y = 6

any help and explanation would be appreciated.

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exam Other Question

-3,-24,-81,-192,_,_,_
What are the next three numbers in the sequence and how did you get them?
Hi, again thanks for all the help it is great during finals week.
Find the vertex and intercepts then graph the equation state if the concave is up or down.
f(x)=3(x-2)^2-3.
Thanks.