Mathematics 2 1 answer for Wenzhou senior high school entrance examination in 2006
( 1)y = 4-x 0 & lt; X<4 (2) connects these two points through (4,0) and (0,4). These two points should be hollow, because they can't be taken (but I don't know if the function image you want is limited by the scope of the first question, if you don't make a straight line through these two points directly).