Mathematics for IGCSE & O level - Graphs Of Functions (Section 5 - No. 16)

If 'a' in the quadratic equation y=ax^2+bx+c is positive, what can be said about the graph?
The graph opens downwards.
The graph is a straight line.
The graph opens upwards.
The graph is a hyperbola.

Explanation

A positive 'a' value means the parabola opens upwards.

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