ok do i draw this graph

Mr F says: Yes, use a graphics calculator.
and then add the rectangles,

Mr F says: Yes, add the area of each of the four rectangles. As has already been stated, the total area is , where and .
if so can u tell me what it is supposed to look like,

Mr F says: Draw the graph (use a graphics calculator to get it) and draw in the rectangles. Then you'll know what it looks like.
im sorry i am completely lost, i don't understand anything!

Mr F says: But you must surely have some examples to follow ....?