Which is the equation of a parabola with vertex (0, 0), that opens to the right and has a focal width of 8? a. y^2=8x b. y^2=-8x c. x^2=8y d. x^2=-8ywhich is the equation of a parabola with vertex (0, 0), that opens to the right and has a focal width of 8? a. y^2=8x b. y^2=-8x c. x^2=8y d. x^2=-8y