The positive solutions of the equation $ax + by + c = 0$ always lie in the

Graph of equation $0 x+3 y=21,$ is perpendicular to which axis ?

Write each of the following equations in the standard form $a x+b y+c=0$ and indicate the values of $a, b$ and $c$ in each case

$0.2 x+0.5 y=1.2$

The graph of the equation $x+y=11$ passes through first quadrant and ………….

In a Cartesian plane, the graph of equation $y=5$ is a parallel to the…….. $-$axis.