7. Yamini and Fatima, two students of Class IX of a school, together contributed Rs. 100 towards the Prime Minister’s Relief Fund to help the earthquake victims. Write a linear equation which satisfies this data. (You may take their contributions as Rs. x and Rs. y.) Draw the graph of the same.
Let contribution of yamini be x.
contribution of yamini be y.
According to question,
For x=0 , we have
For x=10 , we have
For x=20 , we have
Hence, (0,100) , (10,90) and (20,80)