The Table Below Shows the Weight of a Calf Raised

Multiple Choice

The table below shows the weight of a calf raised by a local rancher. Use the information to determine the average rate of change in the calf's weight per day.
$\begin{array}{l}\text { Calf's Weight }\\\begin{array} { r | c } \text { Day } & \text { Weight (lbs) } \\\hline 1 & 505 \\5 & 525 \\15 & 575 \\25 & 625 \\40 & 700\end{array}\end{array}$

A) 5 lbs per day
B) 500 lbs per day
C) 50 lbs per day
D) $\frac{1}{5} \text { lb per day }$