Question 416606
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Hi
Graph the equation and naming the slope,if it exist.
 x = -1  There is NO slope, line is perpendicular 
  Pt(-1,7) plotted
{{{drawing(300,300,   -10,10,-10,10,blue(line(-1,10,-1,-10)), grid(1),
locate(4.3,4.6,"I"),
locate(-4.3,4.6,"II"),
locate(-4.3,-4.6,"III"),
locate(4.3,-4.6,"IV"),
circle(-1,7,0.4),
graph( 300, 300, -10,10,-10,10))}}}