Finding an equation when given a limit

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I have a math homework that I have no clue how to complete. It’s asking me to graph a line when it gives me the limit and I need to find the equation because I need to program the graph.

F(x) is continuous everywhere Lim x-> inf f(x) =5 Lim x-> -inf f(x) = infinity

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You can take $$f(x)=5+e^{-x}$$

$$\lim_{x\to +\infty}=5+0=5$$ $$\lim_{x\to -\infty}=5+\infty=+\infty$$

$f$ is continuous at $\Bbb R$.