A standard line equation takes the form of y=mx+b
m= the slope so we see that 2 is next to x in your example
A) Slope = 2
Perpendicular lines will have the negative reciprocal of the original equation's slope
2 -> -[tex]\frac{1}{2}[/tex]
B) [tex]y=-\frac{1}{2} x+3[/tex]