how to draw a graph on statments x+y=4

Question

plz help me solving this sum

Answer 1

This graph will be a straight line. solving for y, you get y = -x+4.

When x=0, y=4...so the point with coordinates(0,4) is on the line.

Setting x=4, you find that y=0, so point (4,0) is on the line.

Draw a line through these two points. DONE.