Question

Choose the equation of the line passing through the point (-3, -1) and perpendicular to y = one halfx + 3.

y = -2x - 7

y = -2x +5

y = 2x + 5

y = 2x - 7

Answer 1

firstly you should try to provide (-3,-1) point and if two line perpendicular product of these line's slope must be -1 so equation is
y=-2x-7

Answer 2

well, only one of the given equation is satisfied by the point (-3,-1).. So, that particular equation is your answer. you may forget the slope thing for a while.. :)