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$L=-5.6+1.1d$ $\newline$After tracking a species of migratory bird for ten years, the latitude, $L$, in degrees north for the species of bird $d$ days after March $1$ and until May $1$ is approximated by the equation. By approximately how many degrees north does the latitude of the bird species change each day between March $1$ and May $1$ ?$\newline$Choose $1$ answer:$\newline$(A) $-5.6$$\newline$(B) $-1.1$$\newline$(C) $1.1$$\newline$(D) $5.6$