A cubic function.
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x=1
y=x+1 there for answer is 2
y equals x-4 plus 2 is the same as y = x-2. You just translate the graph of y=x, 2 units to the right, OR 2 down.
32 cubed equals to 32768.
x = ¼x^4 + 4x + k where k can be any number