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An interactive plot of the parabola one-fifth t squared minus 1 multiplied by the shifted unit step u-sub-c of t; the reader drags the switch point c along the t-axis and hovers over the labels to highlight each graph and see how c turns the parabola on and off.
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Hover over the labels \(g(t)\text{,}\) \(\left(\frac15 t^2 - 1\right)\) and \(u_c(t)\) to highlight its graph.
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Drag the value of \(c\text{,}\) initially at \((0,0)\text{,}\) along the \(t\) axis.
