exam Maths Puzzle Numerical Ability

Is there origin symmetry for the rational function f(x)=4x/6x^2+1?
a. yes
b. no

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5/7 of a group of students are boys.
There are 18 more boys than girls.
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Please show me the graph of y=3/x/-200. Read 3 time the absolute value of 3 minus 200. Thank you.