Parallel lines have the same slope.
y=mx + b is slope intercept form: m is the slope, b is the intercept.
y = (-2/3)x + b is the equation of the new line. Plug in the given point to find the b, intercept.
Plug in (-3,-5) for (x,y)
-5 = (-2/3)*-3 + b
-5 =2 + b
-7 = b
The equation of the parallel line is y=(-2/3)x -7