Mathematics for IGCSE & O level - Graphs Of Functions (Section 5 - No. 38)
Which of the following describes the graph of y= x^2 - 6x + 9?
A straight line
An upward-opening parabola.
A downward-opening parabola.
A hyperbola.
Explanation
It's a parabola, and the positive x^2 term ensures it opens upwards.
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