Answer:
[tex]y=4x^{3}[/tex]
Step-by-step explanation:
We know that,
'Vertical stretch means that the function stretches up and down towards the y-axis'.
i.e. The general form of vertical stretch is given by 'kf(x)', where k>1 is the factor by which function is stretched.
So, the given function, [tex]y=x^{3}[/tex] is stretched by a factor of 4.
So, the new function formed will be [tex]y=4x^{3}[/tex].
Hence, the equation describing the vertical stretch is [tex]y=4x^{3}[/tex].
