Mathematics for IGCSE & O level - Graphs Of Functions (Section 3 - No. 47)
Which of the following is a key element when drawing the graph of a quadratic equation?
Using a straight edge.
Plotting at least two points.
Plotting several points and then connecting them to form a smooth curve.
Extrapolating the line as far as possible.
Explanation
For a smooth curve, several points must be plotted.
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