Question 245535
if we have this type of question x+2y<-25 so, how we are going to graph nad solve it
-------------
You NEVER graph an ineqality directly.  You graph the boundary of the 
inequalit which is always an EQUALITY.
----
Solve your INEQUALITY for "y":
y < (-1/2)x - 12.5
---------------------------
Now, graph y = (-1/2)x-12.5 as a dashed line.
{{{graph(400,300,-40,40,-40,40,(-1/2)x-12.5)}}}
------------------------------
Then, since you want y to be LESS THAN (-1/2)x-12.5,
shade the half-plane BELOW the dashed line.
---------------------------------------
{{{graph(400,300,-40,40,-40,20,y<(-1/2)x-12.5)}}}
---------------------------------------
That half-plane is the graph of the INEQUALITY.
--------
Cheers,
Stan H.