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https://www.desmos.com/calculator

However i can try to explain it but it would not be the best.

for the first equation type into desmos f(x) = 1/(x + 1)

ok!! I understand. I am confused as well. Haha thanks

See if this helpes with the describing aspect :)
http://www.purplemath.com/modules/fcns2.htm

thank you!!

so at x = -1 there should be nothing. It's a break.

so for the domain it's all real numbers except when x = -1

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