Quadratic graphs follow the same basic procedure as straight-line graphs - only they're a little different:
Draw the graph of y = x2 - 2x for the values of x -2 to 3.
Ok, so first we need a table like before. But now we have four levels:
Ok, so now we can plot a graph with this:
And that's it! There are other types of graph, but straight-line and quadratic are the main ones we'll be doing. Make sure you remember that quadratic graphs DO NOT have to be straight - actually they shouldn't be! Here is a quick quiz to test yourself:
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