The parabola has its vertex at the origin and opens upward. which of the equations could be the equation of this parabola? a. y = -3x2 b. x = 3y2 c. y = 3x2 d. x = -3y2

A parabola opening upwards has a standard form of equation of y -k  = 4a (x-h) where point (h,k) is the vertex of the parabola. In this case, a positive 4a indicates an upward opening, otherwise negative related to a downward opening. The equation that applies is C.

(180(n+2))/n
where n is the number of sides