What is an equation of a parabola with a vertex at the origin and directrix x = 4.75?
y = -1/19x^2
y = 1/19x^2
y = -1/19y^2
y = 1/19y^2
choose one answer correct one pls
y = -1/19x^2
y = 1/19x^2
y = -1/19y^2
y = 1/19y^2
choose one answer correct one pls