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solniwko [45]
3 years ago
10

Write a formula for quadratic function if its graph has the vertex at point (0,6) and passes through the point (−1,−2).

Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
4 0

Answer:

y = - 8x² + 6

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (0, 6), thus

y = a(x - 0)² + 6, that is

y = ax² + 6

To find a substitute (- 1, - 2) into the equation

- 2 = a(- 1)² + 6, that is

- 2 = a + 6 ( subtract 6 from both sides )

- 8 = a

y = - 8x² + 6

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