Question

The focus and vertex of a parabola are (4,5) and (3,6). The equation of axis is

• A. 2x-y+3=0
• B. 2x-y=0
• C. 2x+y-13=0
• D. x+y-9=0

Answer 1

The correct option is D

x+y-9=0

$S=(4,5)$ Eqn of axis $\frac{y-5}{1}=\frac{x-4}{-1}$
$A=(3,6)\Rightarrow -y+5=x-4\Rightarrow x+y-9=0$