choose the letter of the correct answer. no need solutions

1. In the equation of the parabola y= = 64x, how long is p? A. 64 units B. 16 units C. 8 units D. 4 units 2. In the equation of the parabola y= = 64x,what is the coordinate of the vertex? A (0,0) B. (0.8) C. (16,0) D. (0,16) 3. The parabola opens right and p is 4 units, which is the following provides its standard equation? A y' = 16x B. y' = -16x C. x3 = 16y D. x2 = -16y 4. What is the coordinate of the vertex of this parabola, (x + 5)= = 4(y -6) A (5,-6) B. (-5,6) C. (6,-5) D. (-6,5) 5. The directrix of a certain parabola with vertex at the origin lies @ y = 4. Determine its standard equation. A y- = 16x B. y= = -16x C. x= = 16y D. x- = -16y 6. In graphing the parabola, x- = 24y , what is the coordinate of the focus? A (0,-6) B. (0,6) C. (6,0) D. (-6,0)| 5