



 
Hi Marina. I'll show you with a similar question:
A perpendicular line is one that has the negative reciprocal slope of the line it is perpendicular to. So I need to know the slope of the line 4x + 10y = 5. To find it, I convert to y=mx+b form:
So the slope of the new line is the negative reciprocal of (2/5), which is just (5/2). Now I know a point on the new line and the slope of the new line. I can use the following template of a line to finish the equation:
I substitute in what I know, then convert to standard form:
You can solve your problem the identical way, Marina. Hope this helps,  


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