3. Find an equation of a parabola with a vertex at the origin and directrix y = - 1.5 (1 point)
x = 1/6 * y ^ 2
x = - 1/6 * y ^ 2
y = - 1/6 * x ^ 2
y = 1/6 * x ^ 2
x = 1/6 * y ^ 2
x = - 1/6 * y ^ 2
y = - 1/6 * x ^ 2
y = 1/6 * x ^ 2