Write the point-slope form of the equation of a line that passes through the points $\left(2,1\right)$ and $\left(-4,3\right)$ . Then graph the equation.

• A. $y-1=-\frac13\left(x-2\right)$
• B. $y-3=-\frac13\left(x-2\right)$
• C. $y=\frac13x-4$
• D. $y-2=-\frac13\left(x-1\right)$