Can someone please explain this to me?? Write an equation for the following transformation of y=x: a vertical stretch by a factor of 4

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y = A ( Bx + C ) + D A = vertical stretch thus if the "parent function" is \(\bf y = x\) the "transformed function" is \(\bf y = \color{red}{4}x\)

transformed just means, the parent function, or a basic barebones function, with PADDED WITH EXTRA STUFF AROUND

I just don't understand :c

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