Which of the following describes the graph of y=x^2−144?
1 answer:
Y=x^2-144 has zeros when
x^2-144=0
x^2=144
x=√144
x=±12
dy/dx=2x, and d2y/dx2=2 since acceleration is a constant positive when dy/dx=0, y(x) is at an absolute minimum. So the parabola opens upwards.
So the graph has zeros at -12 and +12 and opens upwards.
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