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F. The equation y=mx+c for a straight line; gradient and intercept.
Make sure you understand how to plot straight lines and how the values of m and c effect the graph of y = mx+c.

F1: y=mx+c Coordinates and lines
Where straight-line graphs cross the y-axis
Equations of the form y= mx + c
   
F2: Gradient and intercept The gradient of lines given by y= mx + c
The y-intercept of lines given by y= mx + c
Parallel lines
perpendicular lines
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