8 and 1 are alternate exterior angles.
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A function is positive if it lies above the x axis.
This function is positive before x = -4, i.e. over the interval 
It is negative elsewhere, i.e. over the interval 
So, the only correct option is the second one.
It will be a reflex angle
A reflex angle is an angle that is more than 180° and less than 360°
Obtuse: More than 90° but Less than 180°
Acute: Less than 90°
1. y= -x - 15
2. y= -4x + 1/2
3. y= 2x + 1
4. y= 2/3x + 3
5. y= -1/2x - 4
6. y= -3x + 13
Glad I could help