Question 1156296
<pre>

{{{drawing(440,480,-14,10,-10,12,
graph(440,480,-14,10,-10,12), 

line(-12,11,-7,-9),

line(3,-9,8,11),line(-7,-9,-2,11),line(3,-9,-2,11),

locate(-12,11,"(-12,11)"), locate(-5.1,11,"(-2,11)"),
locate(5.1,11,"(8,11)"),locate(-7,-9,"(-7,-9)"),
locate(3,-9,"(3,-9)"),locate(3,-9,"(3,-9)")  )}}}

Here is the way to find the equation of the line
connecting (-12,11) and (-7,-9) and where to put 
the right side of it in the piece-wise function.

Find the slope of the line from (-12,11) to (-7,-9)

{{{m=(y[2]-y[1])/(x[2]-x[1])=((-9)-(11))/((-7)-(-12))=(-9-11)/(-7+12)=(-20)/(5)=-4}}} 

Find the equation:

{{{matrix(5,1,
y-y[1]=m(x^""-x[1]),
y-(11)=(-4)(x-(-12)^""),
y-11=(-4)(x+12^""),
y-11=-4x-48,
y=-4x-37)}}}

Here is how to place the right side of the equation of
that line in the piecewise function:

{{{matrix(1,3,
"f(x)",""="",
system(matrix(4,3,

-4x-37,if,-12<=x<-7,
"?",if,"?"<=x<"?",
"?",if,"?"<=x<"?",
"?",if,"?"<=x<="?")))}}}

Now YOU do the same thing with the other lines and fill in 
where the question marks are.

Edwin</pre>