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What you need to know
What you need to know:
In the equation for a straight line, y = mx + c, you should know that m is the gradient – the slope – and c is the y-intercept – where the line crosses the y-axis. This is enough information to be able to draw the straight line. Bear In mind, sometimes the equation is not given exactly in this form and will require some algebraic rearranging. It’s important that it is in the form y = mx + c, otherwise your values for the gradient and y-intercept could be wrong.
From here, you know that the line passes through the y-axis at a certain point, and you know the gradient which means you know how much the y values on your line increase with respect to x. This is enough information to, starting from the y-intercept, plot several (at least 3) points, and draw your straight line graph.
Drawing Straight Line Graphs Revision and Worksheets
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