Write each of the following as an equation in two variables

$3 y=-11$

Total cost of a school picnic consists of two parts $-$ bus fare ₹ $200$ and cost of snacks at the rate of ₹ $30$ per student. Representing the total number of students by $x$ and the total cost by $y,$ form the linear equation in two variables and draw its graph. If the number of students going on the picnic is $40,$ find the total cost.

The Autorikshaw fare in a city is charged $Rs.\, 10$ for the first kilometer and @ $Rs.\, 4$ per $kilometer$ for subsequent distance covered. Write the linear equation to express the above statement. Draw the graph of the linear equation.

One of the solutions of the linear equation $3 x+5 y=30$ is $\ldots \ldots . .$

Any solution of the linear equation $2 x+0 y+9=0$ in two variables is of the form: