Mathematics for IGCSE & O level - Graphs Of Functions (Section 4 - No. 9)
What happens when 'a' is negative in the quadratic equation y = ax^2 + bx + c?
The graph opens upwards.
The graph opens downwards.
The graph is a straight line.
The graph has no x-intercepts.
Explanation
When 'a' is negative, the parabola opens downwards.
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