or the pairs of lines defined by the following equations indicate with an "I" if they are identical, a "P" if they are distinct but parallel, an "N" (for "normal") if they are perpendicular, and a "G" (for "general") if they are neither parallel nor perpendicular.
3x+4y+5=0 and y=-\frac{3}{4}x-\frac{5}{4}.
x = \sqrt{2} and y=\pi.
y=x+1 and 3x+5y+7=0.
y=-\frac{3}{4}x and 3x+4y+7=0.

Question

or the pairs of lines defined by the following equations indicate with an "I" if they are identical, a "P" if they are distinct but parallel, an "N" (for "normal") if they are perpendicular, and a "G" (for "general") if they are neither parallel nor perpendicular. 
 3x+4y+5=0 and y=-\frac{3}{4}x-\frac{5}{4}. 
 x = \sqrt{2} and y=\pi. 
 y=x+1 and 3x+5y+7=0. 
 y=-\frac{3}{4}x and 3x+4y+7=0.