Question

A parabola is given in its standard form as $y^2=8x$. The coordinates of the foci are

• A. $(2,0)$
• B. $(0,2)$
• C. $(-2,0)$
• D. $(0,-2)$

Answer 1

The correct option is A $(2,0)$

The standard form of a parabola is $y^2=4ax$

In this statement, parabola is $y^2=8x$

When comparing these 2 equations:

$y^2=4ax$ and$y^2=8x$, we get

$a=2$

There is no $b$ term, hence the value of $b=0$

Hence, the coordinates of the foci are $(2,0)$.