Functions of the Form \(y = ax^{3} + bx^{2} + cx + d\)

Functions of the Form \(y = ax^{3} + bx^{2} + cx + d\)

Optional Investigation: The effects of \(a\) on a cubic function

Complete the table below and plot the graphs of \(f(x)\) and \(g(x)\) on the same system of axes.

Be careful to choose a suitable scale for the \(y\)-axis.

\[f(x) = 2x^{3} - 5x^{2} - 14x + 8 \qquad \qquad g(x) = -2x^{3} + 5x^{2} + 14x - 8\]
\(x\) \(-\text{3}\) \(-\text{2}\) \(-\text{1}\) \(\text{0}\) \(\text{1}\) \(\text{2}\) \(\text{3}\) \(\text{4}\) \(\text{5}\)
\(f(x)\) \(-\text{25}\)
\(g(x)\) \(\text{25}\)

The effects of \(a\) on a cubic graph

d24d40e4e1002a1f21b8bb7ad891e0e8.png

This lesson is part of:

Differential Calculus

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