The equation of line line a gis y = (startfraction b over a + c endfraction)x. The midpoint of bc is (a + c, b). Does the midpoint of bc lie on line a g? why or why not? no, because (startfraction b over a + c endfraction)b does not equal a + c no, because (startfraction b over a + c endfraction)(a + c) does not equal b yes, because (startfraction b over a + c endfraction)b = a + c yes, because (startfraction b over a + c endfraction)(a + c) = b.