Since the lines are paralel within each other both will have the same slope.
Find the slope for the line with the given coordinates using the definition
![m=(y_2-y_1)/(x_2-x_1)](https://img.qammunity.org/2023/formulas/mathematics/high-school/78uaqhwt0aws3qfwxigaftpihnmb1gzxtp.png)
name the points
point 1 = (8,-4)
point 2 = (4,2)
replace in the definition
![\begin{gathered} m=(2-(-4))/(4-8) \\ m=(6)/(-4) \\ m=-(3)/(2) \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ikgecmr0fystq6mb76nv4jxvzs4netqdkx.png)
The slope of a line parallel to one with the coordinates given is -3/2