(1) Plot these points on the coordinates axis and join them: Which gives a straight line? Which is not? Why?

(i) A(1,2) , B(-3,4) , C(7,-1)  (ii) P(3,-5), Q(5,-1) , R(2,1) , S(1,2)

(i) Points ABC gives a straight line.

Yes No

(ii) Points PQR gives a straight line.

Yes No