You can put this solution on YOUR website! You need to choose three numbers for x and solve for y, then graph the points.
y=x-1
lets start with making x=1
so solve the equation;
y=(1)-1
y=-1
y=-
first point = (1,-)
now let x=2
y=(2)-1
y=-1
y=0
Next point (2,0)
for third:
x=4
y=(4)-1
y=-1
y=2-1
y=1
3rd point (4,1)
:)