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Create a 2D Parametric Plot showing a spiral path. The parametric equations for a logarithmic spiral are x=k^u Cosine(u), y=k^u Sine(u), where k is a constant, and u is the plot parameter. What does the value of k determine?

I have been typing in the following but it is wrong

ParametricPlot[{(k^u)*(Cos

__) /. {k -> 1}}, {(k^u)*(Sin__

__) /. {k ->__

1}}, {u, 0, 6 Pi}]

Can anyone help?

much appreciated1}}, {u, 0, 6 Pi}]

Can anyone help?

much appreciated