The 10 students of class Tenth participated in mathematical quiz. If the no. of girls is 4 more
than the no. of boys. then represent this situation in graphical form.
Solution – Let the no. of girls be x and no. of boys be y.
No. of girls + No. of boys =10 ⇒ + = − −(1)
x 10 0
y 0 10
No. of girls = No. of boys+4 ⇒ = + ⇒ − = ------(2)
x 4 7
y 0 3
Solution on graph represents unique solution i.e. only one solution
x=? and y=?
Pair of linear equations in two variables represents a geometrically straight line.
Question1. In above example write the values of x and y for the unique solution in the graph shown.
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Let the no. of girls be x and no. of boys be y.
No. of girls + No. of boys =10 ⇒ + = − −(1)
x 10 0
y 0 10
No. of girls = No. of boys+4 ⇒ = + ⇒ − = ------(2)
x 4 7
y 0 3
Solution on graph represents unique solution i.e. only one solution
x=? and y=?
Pair of linear equations in two variables represents a geometrically straight line.
Question1. In above example write the values of x and y for the unique solution in the graph shown.
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