The graph of $y=6$ is a line

If the point $(5,2)$ lies on the graph of the equation $3 x+2 y=k,$ then $k=\ldots \ldots \ldots$

Write each of the following as an equation in two variables

$4 y=24$

Give equations of four lines passing through point $(3,5)$

The autorickshaw fare in a city is as follows 

For the first kilometre, the fare is ₹ $10,$ for the subsequent distance it is ₹ $3$ per $km$. Taking the distance covered as $x$ $km$ and total fare as ₹ $y,$ write a linear equation for this information and draw its graph. Find the total fare for a journey of $4$ kilometres from the graph.