This question tests upward translation of a parabola.
\( \begin{array}{l}\text{Which graph shows the transformation of } y = x^2 \text{ into } y = x^2 + 3?\end{array} \)
Choose one option:
Check the constant added to the function for vertical shift direction and magnitude.
Adding a constant outside the function moves all points vertically by that amount, while keeping the parabola shape unchanged.
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