You can put this solution on YOUR website! Y=mX+b is the line formula where m=slope & b=the Y intercept.
Y=X+3 This equation says the slope (m)=1 & the Y intercept=3.
Find 2 points to plot from by setting Y=0 & solve for X.
0=X+3
x=-3 or (-3,0)
The Y intercept is (0,3) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10,x +3).