2
'(0,-3)'
'(1,5)'
'(-1,2)'
'(0,0)'
'(-4,15)'
'y=2x-3'
'y=4x+1'
'y-3x=5'
'y=-7x'
'y=11-x'
'(1/2,-2)'
'(0.25,2)'
'(1,8)'
'(0.1,-0.7)'
'(10/3,23/3)'
'y=2x-3'
'y=4x+1'
'y-3x=5'
'y=-7x'
'y=11-x'