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Find coordinates of focus ; equation of directrix ; length of latus rectum and ends of latus rectum 

y2 + 16x = 0 

y2 = -16x 

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Equation of parabola : y2 = -16x 

On comparing with : y2 = -4ax , 4a = 16 , a = 4 

Focus : S = (-a,0) = (-4,0) 

Equation of directrix : 

x - a = 0 

 x - 4 = 0 

Length of latus recturm = 4a = 16 units 

Ends of latus rectum : 

L = (a , 2a) = (-4,8) 

L’= (-a,-2a) = (-4,-8)

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