Need help with slope!
http://prntscr.com/d7rp84

Question

Need help with slope!
http://prntscr.com/d7rp84

poto · Answer

@3mar

3mar · Answer

Well, I am here.

mathmale · Answer

The given equation is 3x - 5y = -4
Use the fact that the slopes of perpendicular lines are negative reciprocals of one another.  If, for example, the slope of the given line is 5, then the slope of a perpendicular line would be -1/5, which is the "negative reciprocal" of 5.

Find the specific slope for 3x - 5y = -4.  Then find the "neg recip" for that slope.

poto · Answer

Just give me a second!

3mar · Answer

Take your time.

mathmale · Answer

1.  Solve 3x - 5y = -4 for 5y.
2.  Divde all terms of your result by 5.
3.  Identify the slope of 3x - 5y = -4.
4.  Find the "neg recip" of your result.

mathmale · Answer

Another way:  Divide all terms of 3x - 5y = -4 by -5.
Solve the resulting equation for y.

poto · Answer

So the slope would be 
$$\frac{ 3 }{ 5 }$$

mathmale · Answer

Looks good.  What's the neg recip of that?

3mar · Answer

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