Hi
Are the lines wtih the given slopes parallel? No
m= -2/3, m = 2/3
For example: y = -2/3x (Green) and y = 2/3x (Blue)
Note the effect of a slope of a Line being positive:
y and x 'vary in the same direction'..getting larger or smaller together
and as in the case of the (blue) line... slant to the right