Question 1029736
<pre><b>
You first of all plot the line x = 7.

Since it says "x equals seven". Go out to where 'x equals 7' 
on the x-axis, and draw a vertical line through it, like the
green one below:

{{{drawing(400,400,-10,10,-10,10, graph(400,400,-10,10,-10,10),
green(triangle(7,-20,7,20,730)) )}}}

Now plot the point (-4,3), which is the red point below:

{{{drawing(400,400,-10,10,-10,10, graph(400,400,-10,10,-10,10),
red(locate(-4,3,"(-4,3)")),
red(circle(-4,3,0.15),circle(-4,3,0.13),circle(-4,3,0.11),circle(-4,3,0.09),circle(-4,3,0.07),circle(-4,3,0.05),circle(-4,3,0.03),circle(-4,3,0.01)),
red(line(-24,-12,-24,12)),



green(triangle(7,-20,7,20,730)) )}}} 

Now draw a red line through it parallel to it..

{{{drawing(400,400,-10,10,-10,10, graph(400,400,-10,10,-10,10),
red(locate(-4,3,"(-4,3)")),
red(circle(-4,3,0.15),circle(-4,3,0.13),circle(-4,3,0.11),circle(-4,3,0.09),circle(-4,3,0.07),circle(-4,3,0.05),circle(-4,3,0.03),circle(-4,3,0.01)),
red(line(-4,-12,-4,12)),



green(triangle(7,-20,7,20,730)) )}}} 

Now think about this.  If the green line's equation is 

x = 7 

because it is a vertical line that goes through the point 
on the x-axis where x equals 7,

Then what would you suspect the equation of a vertical line
that goes through the point on the x-axis where x equals -4,
would be?

Answer:  x = -4

If you're wondering about the 3 in (-4,3)? and why you did
nothing with it, just realize that the line would have been 
the same line regardless of what number was where the 3 is.

Edwin</pre></b>