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Investigating Cubic Graphs in Factorised Form

This worksheet allows you to investigate cubic graphs given in Factorised Form. Use the sliders to change the values of a, b, c and d and note what happens to the shape of the graph, and where it cuts the x and y-axes.
Which parts of the equation tells you the x-intercepts? How can you work out the y-intercept? How can you tell if the curve goes from bottom left to top right or vice versa?