Line of Best Fit = -0 A) $19.48 \mathrm { mg }$

Line of best fit = -0.68x + 82.91
Choose the one alternative that best completes the statement or answers the question.
-A drug company establishes that the most effective dose of a new drug relates to body weight as shown below. Let body weight be the independent variable and drug dosage be the dependent variable. Use a graphing utility
To draw a scatter diagram and to find the line of best fit. What is the most effective dosage for a person weighing
140 lbs? $\begin{array} { l c } \hline \text { Body } & \text { Drug } \\\text { Weight } ( \mathrm { lbs } ) &\text { Dosage } ( \mathrm { mg } ) \\\hline 50 & 10 \\100 & 12 \\150 & 17 \\200 & 19 \\250 & 21 \\\hline\end{array}$

A) $19.48 \mathrm { mg }$
B) $14.5 \mathrm { mg }$
C) $12.07 \mathrm { mg }$
D) $15.22 \mathrm { mg }$