# Class 9 Math Linear Graphs and their Applications

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$3. Are the following lines (i) parallel to x -axis (ii) parallel to y -axis?(iv) x+y=0$

$Solve the following pair of equations in x and y graphically.3. 2 x+y=0 and x+2 y=2$

$2. Draw the graph of each of the following.(xiii) x-3 y+1=0$

$1. Draw the conversion graph between litres and gallons using the relation 9 litres =2 gallons (approximately) and taking litres along horizontal axis and gallons along vertical axis. From the graph read(i) the number of gallons in 18 litres$

$6. Solve the following pair of equations graphically.(iii) \frac{1}{3}(x+y)=2 \frac{1}{2}(x-y)=-1$