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- Engr. RonaldLv 74 months ago
y = a(x - h)^2 + k

8 = a(6 - 7)^2 + 15

8 = a + 15

8 - 15 = a

a = - 7

The equation of the vertex of the parabola is y = - 7(x - 7)^2 + 15... answer//

- AshLv 74 months ago
y= a(x-h)²+k

y = a(x-7)² + 15

since it passes through (6,8)

8 = a(6-7)² + 15

-7 = a

so the equation becomes

y = -7(x-7)² + 15

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