+1438 If two equations graph as straight lines, can the system have exactly 2 solutions? Explain your answer, including ALL the possibilities of numbers of solutions. (tell the teacher how many solutions there can be, and what the graphs look like).
+128474 No....
They either intersect at one point (one solution) or
They are parallel (no intersections at all....so...no solutions ) or
They are the same line and intersect at an infinite number of points
This might help : http://nogales.laurusmath.com/cpages/contents/pdf/HS-S3-C3-PO4-notes.pdf
