Slope of line j; m=[tex] \frac{change in x}{change in y} [/tex] m=[tex] \frac{6-1}{-3--6} [/tex] m=[tex] \frac{5}{3} [/tex] Parallel lines have equal gradients; So, y=mx+c y=5/3x+c Replacing for x and y; -1=5/3(15)+c -1=25+c c=-26 y=[tex] \frac{5}{3} x-26[/tex]