Which equation represents a parabola that has a focus of (0, 0) and a directrix of y = 2?
a. x2=−4y
b. x2=−4(y−1)
c. x2=−(y−1)
d. x2=−y

Hey dear, hoping i'll be

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.