exam Maths Puzzle Numerical Ability

I have problem on Chapter 9 Section 3 number 19 from writing exercises

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exam Other Question

find the vertical asymtotes, f any, of the graph of the rational function.

f(x)=x/x^2+4
a. x=-4,x=4
b. x=4
c. x=-4
d. no vertical asymptote write an equation of the line passing through (-3,8) (5,4)