Watch this video to discover how to plot straight lines onto a graph.
Start by creating a table of values, choosing values of x to substitute in to the equation, to get the corresponding value of y. This will generate sets of coordinates, which you can then plot onto the graph.
You need a minimum of 3 coordinates to draw a straight line, but 4 or 5 is better in case you make a mistake.
In part 2, we will look at a trickier example.
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