Question

Choose the correct pair among the choices given below

Column I		Column II
I	The graph of the linear equation $3x+7y=21$ is the line which meets the y-axis at the point?	P	$(0,0)$
II	The graph of the linear equation $7x+3y=21$ is the line which meets the x-axis at the point?	Q	$(0,3)$
		R	$(3,0)$
		S	$(3,3)$

• A. II—R
• B. I—S
• C. I—Q
• D. II—P

Answer 1

Answer: (A), (C)

The graph of the linear equation $3x+7y=21$ meet $y$-axis at point where $x=c$. So, when $x=0$
$0+7y=21\Rightarrow y=3$
So, it meets $y$-axis at $(0,3)$
Similarly, graph of the linear equation $7x+3y$ $=21$
Will meet of $x$-axis at point where $y=0$ $\Rightarrow 7x=21$
So $x=3$
So, the point is $(3,0)$.