This full solution covers the following key subjects: parabolas, origin, directrix, equation, equations. This expansive textbook survival guide covers 85 chapters, and 5218 solutions. The full step-by-step solution to problem: 19E from chapter: 10.4 was answered by , our top Calculus solution expert on 03/03/17, 03:45PM. Calculus: Early Transcendentals was written by and is associated to the ISBN: 9780321570567. This textbook survival guide was created for the textbook: Calculus: Early Transcendentals, edition: 1. The answer to “Equations of parabolas Find an equation of the following parabolas, assuming the vertex is at the origin. Use a graphing utility to check your work.A parabola that opens to the right with directrix x = ?4” is broken down into a number of easy to follow steps, and 36 words. Since the solution to 19E from 10.4 chapter was answered, more than 238 students have viewed the full step-by-step answer.