At y intercept, the co-ordinates are; (0, -3) and the second point is (3,0) Gradient, m= [tex] \frac{change in y}{change in x} [/tex] m=[tex] \frac{0--3}{3-0} [/tex] m=[tex] \frac{3}{3} [/tex] m=1 y=x+c Replacing for x and y using point (3, 0); 0=3+c c=-3 y=x-3
