Does the relationship in this table represent a proportional relationship?
2 answers:
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Given the equation of parabola: y = -x² - 2x - 5
y = ax² + bx + c and negative value of 'a' tell us that it is a downward open parabola whose axis of symmetry would be x = k.
where k is the x-coordinate of vertex of given parabola.
Finding the vertex of parabola, x =
So, the axis of symmetry for this parabola is x = -1.