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mathxl.com Take a Test -jose gonzalez Mathxl.com Take A Test-jose Gonzalez Solve The Pr... I C Mathway | Math Problem Solver Math 2412-P05 (Fall 2017) jose gonzalez Quiz: Quiz #10 (9.4, 9.5, 10.1-10.3) Time Remalning: 01:18:37 Submit Qubz This Question: 1 pt 60116 (5 complete) This Quiz: 16 pts possible Write an equation for the parabola with a vertex at the origin and directrix y=- 28 An equation for this parabola is (Simplify your answer. Use integers or fractions for any numbers in the expression.) Enter your answer in the answer box.

Explanation / Answer

directrix, y=-1/28

Directrix, y=k -(1/4a)

    -1/4a=-1/28

4a=28

a=7

y= ax2

y= 7x2

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