urgent help required!!

[NokiaN95638]

Guyz.. can anyone help me with how to draw graph which says to join the points with 2 intersecing straight line..
w07 p4 no.12b.. i can't post the links.

 

[rafae]

What subject ? :SS

 

[NokiaN95638]

chemistry

 

[muhammadmohsin]

dude
i need help could u please open oct/nov 2001 chemistry atp paper 4 and open the question 9 of it

the colour change is colour less to purple , but my answer is opposite , i think it should be purple to colour less plz help